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Date
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amba
[ DIR ]
drwxr-xr-x
2018-04-05 07:11
bcma
[ DIR ]
drwxr-xr-x
2018-04-05 07:11
byteorder
[ DIR ]
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2018-04-05 07:11
can
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ceph
[ DIR ]
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clk
[ DIR ]
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crush
[ DIR ]
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decompress
[ DIR ]
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dma
[ DIR ]
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extcon
[ DIR ]
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2018-04-05 07:11
fpga
[ DIR ]
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2018-04-05 07:11
fsl
[ DIR ]
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gpio
[ DIR ]
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hsi
[ DIR ]
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i2c
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iio
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input
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irqchip
[ DIR ]
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isdn
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lockd
[ DIR ]
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mfd
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mlx4
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mlx5
[ DIR ]
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mmc
[ DIR ]
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mtd
[ DIR ]
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netfilter
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netfilter_arp
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netfilter_bridge
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netfilter_ipv4
[ DIR ]
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netfilter_ipv6
[ DIR ]
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perf
[ DIR ]
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2018-04-05 07:11
phy
[ DIR ]
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pinctrl
[ DIR ]
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platform_data
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power
[ DIR ]
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qed
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raid
[ DIR ]
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regulator
[ DIR ]
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reset
[ DIR ]
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2018-04-05 07:11
rtc
[ DIR ]
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2018-04-05 07:11
sched
[ DIR ]
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2018-04-05 07:11
soc
[ DIR ]
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2018-04-05 07:11
spi
[ DIR ]
drwxr-xr-x
2018-04-05 07:11
ssb
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sunrpc
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ulpi
[ DIR ]
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unaligned
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usb
[ DIR ]
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uwb
[ DIR ]
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wimax
[ DIR ]
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8250_pci.h
999
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2016-01-11 00:01
a.out.h
315
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acct.h
2.51
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acpi.h
28.37
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2018-04-02 18:07
acpi_dma.h
3.22
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2016-01-11 00:01
acpi_pmtmr.h
635
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2016-01-11 00:01
adb.h
1.75
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adfs_fs.h
535
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aer.h
1.66
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agp_backend.h
3.45
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agpgart.h
3.82
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ahci_platform.h
1.49
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aio.h
879
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alarmtimer.h
1.64
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2016-01-11 00:01
altera_jtaguart.h
340
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2016-01-11 00:01
altera_uart.h
358
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amd-iommu.h
5.93
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2016-01-11 00:01
amifd.h
1.95
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amifdreg.h
2.61
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amigaffs.h
2.86
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anon_inodes.h
455
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apm-emulation.h
1.54
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2016-01-11 00:01
apm_bios.h
2.68
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apple_bl.h
459
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arm-cci.h
2.01
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2016-01-11 00:01
asn1.h
1.99
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2016-01-11 00:01
asn1_ber_bytecode.h
2.72
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asn1_decoder.h
675
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2016-01-11 00:01
assoc_array.h
3.07
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2016-01-11 00:01
assoc_array_priv.h
5.49
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2016-01-11 00:01
async.h
1.65
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2016-01-11 00:01
async_tx.h
6.76
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2016-01-11 00:01
ata.h
29.47
KB
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2018-04-02 18:07
ata_platform.h
690
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2016-01-11 00:01
atalk.h
4.28
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2016-01-11 00:01
ath9k_platform.h
1.36
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2016-01-11 00:01
atm.h
248
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2016-01-11 00:01
atm_suni.h
253
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2016-01-11 00:01
atm_tcp.h
472
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2016-01-11 00:01
atmdev.h
9.52
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2016-01-11 00:01
atmel-mci.h
1.31
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2016-01-11 00:01
atmel-ssc.h
9.68
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2016-01-11 00:01
atmel_pdc.h
1.47
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2016-01-11 00:01
atmel_serial.h
7.66
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2016-01-11 00:01
atmel_tc.h
11.33
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2016-01-11 00:01
atomic.h
14.97
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2018-04-02 18:07
attribute_container.h
2.47
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2016-01-11 00:01
audit.h
17
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2018-04-02 18:07
auto_dev-ioctl.h
5.06
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2016-01-11 00:01
auto_fs.h
657
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2016-01-11 00:01
auxvec.h
265
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2016-01-11 00:01
average.h
1.48
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2016-01-11 00:01
b1pcmcia.h
666
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2016-01-11 00:01
backing-dev-defs.h
7.54
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2018-04-02 18:07
backing-dev.h
14.04
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2018-04-02 18:07
backlight.h
5.14
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2016-01-11 00:01
balloon_compaction.h
6.91
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2016-01-11 00:01
basic_mmio_gpio.h
2.23
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2016-01-11 00:01
bcd.h
520
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2016-01-11 00:01
bch.h
2.6
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2016-01-11 00:01
bcm47xx_nvram.h
1.19
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2016-01-11 00:01
bcm47xx_wdt.h
617
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2016-01-11 00:01
bfin_mac.h
559
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2016-01-11 00:01
binfmts.h
3.96
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2016-01-11 00:01
bio.h
21.4
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2018-04-02 18:07
bit_spinlock.h
2.27
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2016-01-11 00:01
bitmap.h
12.57
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2018-04-02 18:07
bitops.h
5.97
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2016-01-11 00:01
bitrev.h
1.96
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2016-01-11 00:01
blk-cgroup.h
21.95
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2016-01-11 00:01
blk-iopoll.h
1.13
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2016-01-11 00:01
blk-mq.h
7.56
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2018-04-02 18:07
blk_types.h
8.43
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2016-01-11 00:01
blkdev.h
48.73
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2018-04-02 18:07
blkpg.h
397
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2016-01-11 00:01
blktrace_api.h
3.31
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2016-01-11 00:01
blockgroup_lock.h
1.14
KB
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2016-01-11 00:01
bma150.h
1.89
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2016-01-11 00:01
bootmem.h
10.61
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2016-01-11 00:01
bottom_half.h
764
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2016-01-11 00:01
bpf.h
6.96
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2018-04-02 18:07
brcmphy.h
8.66
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2016-01-11 00:01
bsearch.h
236
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2016-01-11 00:01
bsg-lib.h
1.98
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2016-01-11 00:01
bsg.h
734
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2016-01-11 00:01
btree-128.h
2.63
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2016-01-11 00:01
btree-type.h
3.86
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2016-01-11 00:01
btree.h
6.8
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2016-01-11 00:01
btrfs.h
106
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2016-01-11 00:01
buffer_head.h
12.73
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2018-04-02 18:07
bug.h
3.56
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2016-01-11 00:01
c2port.h
1.59
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2016-01-11 00:01
cache.h
1.59
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2016-01-11 00:01
cacheinfo.h
3.04
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2018-04-02 18:07
capability.h
7.59
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2018-04-02 18:07
cb710.h
5.69
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2016-01-11 00:01
cciss_ioctl.h
1014
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2016-01-11 00:01
ccp.h
15.37
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2016-01-11 00:01
cdev.h
579
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2016-01-11 00:01
cdrom.h
8.66
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2016-01-11 00:01
cfag12864b.h
2.1
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2016-01-11 00:01
cgroup-defs.h
16.01
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2018-04-02 18:07
cgroup.h
20.48
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2018-04-02 18:07
cgroup_subsys.h
1.39
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2016-01-11 00:01
circ_buf.h
1.05
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2016-01-11 00:01
cleancache.h
3.86
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2016-01-11 00:01
clk-provider.h
27.54
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2018-04-02 18:07
clk.h
13.74
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2016-01-11 00:01
clkdev.h
1.32
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2016-01-11 00:01
clksrc-dbx500-prcmu.h
455
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2016-01-11 00:01
clock_cooling.h
2.06
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2016-01-11 00:01
clockchips.h
7.3
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2016-01-11 00:01
clocksource.h
7.59
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2016-01-11 00:01
cm4000_cs.h
160
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cma.h
920
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2016-01-11 00:01
cmdline-parser.h
1.17
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2016-01-11 00:01
cn_proc.h
1.85
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2016-01-11 00:01
cnt32_to_63.h
3.6
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2016-01-11 00:01
coda.h
2.19
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2016-01-11 00:01
coda_psdev.h
2.62
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2016-01-11 00:01
compaction.h
5.74
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2018-04-02 18:07
compat.h
25.58
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2016-01-11 00:01
compiler-clang.h
320
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2016-01-11 00:01
compiler-gcc.h
9.59
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2018-04-02 18:07
compiler-intel.h
1.13
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2016-01-11 00:01
compiler.h
15.76
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2018-04-02 18:07
completion.h
3.47
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2016-01-11 00:01
component.h
1.14
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2016-01-11 00:01
concap.h
3.69
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2016-01-11 00:01
configfs.h
6.88
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2016-01-11 00:01
connector.h
2.43
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2016-01-11 00:01
console.h
6.08
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2018-04-02 18:07
console_struct.h
5.13
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2016-01-11 00:01
consolemap.h
1
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2016-01-11 00:01
container.h
668
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2016-01-11 00:01
context_tracking.h
3.15
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2016-01-11 00:01
context_tracking_state.h
1.34
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2016-01-11 00:01
cordic.h
1.75
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2016-01-11 00:01
coredump.h
744
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2018-04-02 18:07
coresight.h
8.7
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2016-01-11 00:01
count_zeros.h
1.62
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2016-01-11 00:01
cper.h
12.57
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2016-01-11 00:01
cpu.h
9.04
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2018-04-02 18:07
cpu_cooling.h
3.88
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2016-01-11 00:01
cpu_pm.h
2.78
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2016-01-11 00:01
cpu_rmap.h
1.86
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2016-01-11 00:01
cpufeature.h
1.84
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2016-01-11 00:01
cpufreq-dt.h
569
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2016-01-11 00:01
cpufreq.h
19.34
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2016-01-11 00:01
cpuidle.h
7.89
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2016-01-11 00:01
cpumask.h
23.16
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2018-04-02 18:07
cpuset.h
6.11
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2018-04-02 18:07
cputime.h
334
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crash_dump.h
2.82
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2016-01-11 00:01
crc-ccitt.h
330
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crc-itu-t.h
613
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crc-t10dif.h
376
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2016-01-11 00:01
crc16.h
622
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crc32.h
2.83
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2016-01-11 00:01
crc32c.h
254
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crc7.h
277
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2016-01-11 00:01
crc8.h
3.65
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2016-01-11 00:01
cred.h
12.15
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2018-04-02 18:07
crypto.h
62.56
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2016-01-11 00:01
cryptohash.h
448
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2016-01-11 00:01
cs5535.h
6.28
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2016-01-11 00:01
ctype.h
1.69
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2016-01-11 00:01
cuda.h
462
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2016-01-11 00:01
cyclades.h
10.26
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2016-01-11 00:01
davinci_emac.h
1.12
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2016-01-11 00:01
dax.h
1.45
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2016-01-11 00:01
dca.h
2.62
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2016-01-11 00:01
dcache.h
18.84
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2018-04-02 18:07
dccp.h
10.69
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2018-04-02 18:07
dcookies.h
1.25
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2016-01-11 00:01
debug_locks.h
1.48
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2016-01-11 00:01
debugfs.h
8.5
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2018-04-02 18:07
debugobjects.h
3.65
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2016-01-11 00:01
delay.h
1.39
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2016-01-11 00:01
delayacct.h
4
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2016-01-11 00:01
dell-led.h
133
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2016-01-11 00:01
devcoredump.h
986
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2016-01-11 00:01
devfreq-event.h
5.64
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2018-04-02 18:07
devfreq.h
10.5
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2016-01-11 00:01
devfreq_cooling.h
2.54
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2016-01-11 00:01
device-mapper.h
16.32
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2018-04-02 18:07
device.h
46.96
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2018-04-02 18:07
device_cgroup.h
597
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2016-01-11 00:01
devpts_fs.h
1.1
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2018-04-02 18:07
digsig.h
1.35
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2016-01-11 00:01
dio.h
10.93
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2016-01-11 00:01
dirent.h
177
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2016-01-11 00:01
dlm.h
6.01
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dma-buf.h
8.85
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4.45
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1.38
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dmaengine.h
39.76
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1.09
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7.82
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1008
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367
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7.09
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2.61
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119
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dtlk.h
3.46
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1.71
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807
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2.92
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elevator.h
6.94
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elf-fdpic.h
2.18
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elf-randomize.h
544
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elf.h
1.44
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elfcore-compat.h
1.2
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elfnote.h
3.5
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4.6
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1.48
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1.24
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errqueue.h
450
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etherdevice.h
13.77
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15.11
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eventfd.h
2.05
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7.78
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ext2_fs.h
928
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extcon.h
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16.48
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541
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fanotify.h
206
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fault-inject.h
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fb.h
28.74
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988
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451
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3.13
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609
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12.72
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file.h
1.79
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filter.h
16.17
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fips.h
128
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firewire.h
13.36
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2.01
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4.41
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2.43
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1.25
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8.34
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font.h
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freezer.h
8.65
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frontswap.h
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fs.h
101.01
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3.38
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fs_pin.h
580
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772
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fs_struct.h
999
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fs_uart_pd.h
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18.41
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fscache.h
27.87
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fsl-diu-fb.h
4.08
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fsl_devices.h
4.28
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fsl_hypervisor.h
2.76
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24.76
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398
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fsnotify.h
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fsnotify_backend.h
16.77
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ftrace.h
28.95
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298
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fwnode.h
630
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gameport.h
5.56
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gcd.h
154
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genalloc.h
4.84
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genetlink.h
1.35
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genhd.h
22.72
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genl_magic_func.h
11.91
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7.43
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getcpu.h
602
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gfp.h
20.75
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glob.h
217
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goldfish.h
566
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gpio-fan.h
802
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gpio-pxa.h
532
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gpio.h
5.63
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gpio_keys.h
1.66
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gpio_mouse.h
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hardirq.h
1.7
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hash.h
2.67
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hashtable.h
6.46
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3.43
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hdlcdrv.h
6.28
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hdmi.h
9.27
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hid-debug.h
2.02
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688
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hiddev.h
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highmem.h
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1.29
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host1x.h
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hp_sdc.h
14.02
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14.22
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htcpld.h
578
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htirq.h
1.04
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2.97
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hw_breakpoint.h
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hw_random.h
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hwmon-sysfs.h
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hwspinlock.h
11.06
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hyperv.h
42.12
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i2c-algo-bit.h
2.24
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i2c-algo-pca.h
2.5
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1.88
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i2c-dev.h
1.03
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1.31
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i2c-mux-pinctrl.h
1.44
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1.64
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757
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1.17
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402
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399
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1.41
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2.14
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764
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icmp.h
863
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icmpv6.h
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45.48
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idr.h
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ieee80211.h
74.39
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ieee802154.h
9.65
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2016-01-11 00:01
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1.52
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if_bridge.h
1.98
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if_eql.h
1.07
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1.15
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2.88
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495
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2016-01-11 00:01
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149
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2.83
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if_phonet.h
274
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727
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370
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if_vlan.h
17.17
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igmp.h
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in6.h
1.85
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inet.h
2.61
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inet_diag.h
1.44
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inet_lro.h
3.58
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inetdevice.h
7.72
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init.h
9.37
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init_ohci1394_dma.h
157
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init_task.h
7.25
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initrd.h
583
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inotify.h
657
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input-polldev.h
2.17
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input.h
18.43
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integrity.h
1.02
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intel-iommu.h
16.74
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intel-svm.h
4.33
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intel_pmic_gpio.h
372
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interrupt.h
19.76
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interval_tree.h
757
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interval_tree_generic.h
6.96
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io-64-nonatomic-hi-lo.h
610
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io-64-nonatomic-lo-hi.h
610
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io-mapping.h
3.71
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io.h
4.59
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ioc3.h
3.14
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5.78
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4.7
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iommu-common.h
1.37
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iommu-helper.h
911
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iommu.h
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iopoll.h
5.52
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ioport.h
9.52
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594
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libps2.h
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license.h
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lightnvm.h
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linkage.h
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lp.h
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mailbox_controller.h
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marvell_phy.h
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memblock.h
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memcontrol.h
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memory.h
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memory_hotplug.h
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mempolicy.h
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memstick.h
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mg_disk.h
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micrel_phy.h
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microchipphy.h
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migrate.h
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miscdevice.h
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mmdebug.h
1.6
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mmiotrace.h
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339
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mmu_notifier.h
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mmzone.h
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mnt_namespace.h
508
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mod_devicetable.h
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module.h
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moduleloader.h
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moduleparam.h
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mount.h
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mpage.h
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mpi.h
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mpls.h
103
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mpls_iptunnel.h
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mroute6.h
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msdos_fs.h
234
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msg.h
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msi.h
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mutex-debug.h
473
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mutex.h
5.55
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mv643xx.h
52.4
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mxm-wmi.h
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namei.h
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nd.h
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net.h
10.24
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netdev_features.h
7.92
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netdevice.h
127.88
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netfilter.h
12.17
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netfilter_bridge.h
1.78
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netfilter_defs.h
200
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netfilter_ingress.h
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netfilter_ipv4.h
424
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netlink.h
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netpoll.h
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1.27
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nfs3.h
221
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nfs_fs.h
16.14
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nfs_fs_i.h
269
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nfs_iostat.h
4.15
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nfs_page.h
5.75
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nfs_xdr.h
37.18
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nfsacl.h
1.11
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nilfs2_fs.h
24.93
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nl802154.h
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nls.h
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nmi.h
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node.h
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nodemask.h
16.33
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notifier.h
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ns_common.h
196
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nsc_gpio.h
1.39
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nsproxy.h
2.44
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ntb.h
30.24
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ntb_transport.h
3.8
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nubus.h
4.1
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numa.h
253
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nvme.h
21.63
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nvmem-consumer.h
4.11
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nvmem-provider.h
1.06
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nvram.h
456
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nwpserial.h
551
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of.h
31.84
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of_address.h
4.45
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3.89
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4.37
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2.75
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1.15
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1.01
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708
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1.4
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3.63
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1.34
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oid_registry.h
3.87
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olpc-ec.h
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9.94
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583
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6.55
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520
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once.h
1.65
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3.17
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openvswitch.h
844
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6.1
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1
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oxu210hp.h
158
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padata.h
6.34
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2.95
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18.34
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page-isolation.h
1.94
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1.43
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1.92
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2.58
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page_owner.h
1.16
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pageblock-flags.h
3.08
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pagemap.h
19.79
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pagevec.h
1.7
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parport.h
17.82
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parport_pc.h
6.52
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parser.h
982
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pata_arasan_cf_data.h
1.22
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patchkey.h
718
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path.h
412
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999
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pci-acpi.h
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pci-aspm.h
1.67
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pci-ats.h
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pci-dma.h
415
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pci.h
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pci_hotplug.h
6.79
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pci_ids.h
116.72
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pcieport_if.h
2.16
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pda_power.h
1.12
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pe.h
15.48
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percpu-defs.h
18.81
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percpu-refcount.h
9.92
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percpu-rwsem.h
1.47
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4.37
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percpu_counter.h
4.21
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percpu_ida.h
2.28
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perf_event.h
33.54
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perf_regs.h
969
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personality.h
354
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pfn.h
385
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phonet.h
1.12
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phy.h
26.59
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phy_fixed.h
1.58
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pid.h
5.83
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pid_namespace.h
2.35
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pim.h
518
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pipe_fs_i.h
5.06
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pktcdvd.h
5.87
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pl320-ipc.h
758
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platform_device.h
12.37
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plist.h
8.69
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pm-trace.h
728
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32.04
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1.68
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2.12
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7.35
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4.09
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8.28
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8.28
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1.31
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6.18
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pmem.h
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pmu.h
2.3
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pnfs_osd_xdr.h
9.27
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15.28
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poison.h
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poll.h
4.47
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posix-clock.h
5.29
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posix-timers.h
4.28
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posix_acl.h
3.58
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posix_acl_xattr.h
2.2
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power_supply.h
12.09
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powercap.h
12.58
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ppp-comp.h
3.1
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ppp_channel.h
3.07
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ppp_defs.h
454
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pps-gpio.h
1015
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pps_kernel.h
3.56
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pr.h
527
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preempt.h
8.61
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prefetch.h
1.5
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printk.h
13.2
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proc_fs.h
3.19
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proc_ns.h
2.18
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profile.h
2.64
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projid.h
2.18
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property.h
7.54
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proportions.h
3.19
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psci.h
1.59
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pstore.h
2.54
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pstore_ram.h
2.7
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pti.h
1.53
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ptp_classify.h
2.89
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ptp_clock_kernel.h
6.52
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ptrace.h
14.87
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pvclock_gtod.h
509
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pwm.h
8.58
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pwm_backlight.h
701
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pxa168_eth.h
689
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pxa2xx_ssp.h
9.75
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qcom_scm.h
1.25
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qnx6_fs.h
3.23
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quicklist.h
2.1
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quota.h
18.11
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quotaops.h
10
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radix-tree.h
17.91
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raid_class.h
2.08
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ramfs.h
723
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random.h
3.39
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range.h
612
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ras.h
352
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ratelimit.h
1.89
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rational.h
600
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rbtree.h
4.38
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rbtree_augmented.h
7.5
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rbtree_latch.h
6.58
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rcu_sync.h
2.51
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rculist.h
18.85
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rculist_bl.h
4.32
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rculist_nulls.h
4.26
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rcupdate.h
40.25
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rcutiny.h
4.31
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rcutree.h
3.64
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reboot.h
1.91
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reciprocal_div.h
993
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regmap.h
35.16
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regset.h
13
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relay.h
8.61
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remoteproc.h
17.47
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reservation.h
4.41
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reset-controller.h
1.86
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reset.h
2.38
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resource.h
306
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resource_ext.h
2.22
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rfkill-gpio.h
1.13
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rfkill-regulator.h
1.38
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rfkill.h
9.49
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rhashtable.h
24.9
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ring_buffer.h
6.63
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rio.h
16.47
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rio_drv.h
14.01
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rio_ids.h
1.22
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rio_regs.h
14.73
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rmap.h
8.04
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rndis.h
16.83
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root_dev.h
540
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rotary_encoder.h
362
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rpmsg.h
11.41
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rslib.h
2.99
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rtc-ds2404.h
467
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rtc-v3020.h
1.03
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rtc.h
6.9
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rtmutex.h
2.82
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rtnetlink.h
3.9
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rwlock.h
4.29
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rwlock_api_smp.h
7.63
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rwlock_types.h
1.18
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rwsem-spinlock.h
1.47
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rwsem.h
5.12
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rxrpc.h
2.33
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2016-01-11 00:01
s3c_adc_battery.h
932
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sa11x0-dma.h
572
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scatterlist.h
11.58
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scc.h
2.8
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sched.h
91.89
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sched_clock.h
559
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scif.h
58.85
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scpi_protocol.h
2.36
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screen_info.h
152
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sctp.h
21.93
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scx200.h
1.78
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scx200_gpio.h
2.34
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sdb.h
4.13
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sdla.h
6.9
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seccomp.h
2.66
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securebits.h
200
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security.h
44.23
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2018-04-02 18:07
selection.h
1.32
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selinux.h
910
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sem.h
1.3
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semaphore.h
1.36
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seq_buf.h
3.12
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seq_file.h
6.63
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seq_file_net.h
674
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2016-01-11 00:01
seqlock.h
15.86
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seqno-fence.h
3.91
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serial.h
630
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serial_8250.h
5.35
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serial_bcm63xx.h
4.69
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serial_core.h
15.25
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serial_max3100.h
1.39
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serial_pnx8xxx.h
2.61
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serial_s3c.h
9.24
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serial_sci.h
1.78
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serio.h
4.38
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sfi.h
5.73
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sfi_acpi.h
3.39
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sh_clk.h
6.09
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sh_dma.h
3.61
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sh_eth.h
396
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sh_intc.h
3.39
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sh_timer.h
133
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shdma-base.h
4.41
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shm.h
2.06
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2016-01-11 00:01
shmem_fs.h
2.81
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shrinker.h
2.4
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2016-01-11 00:01
signal.h
12.36
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signalfd.h
747
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2016-01-11 00:01
sirfsoc_dma.h
123
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2016-01-11 00:01
sizes.h
1.19
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skbuff.h
103.49
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slab.h
18.77
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slab_def.h
1.85
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slub_def.h
4.22
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sm501-regs.h
11.76
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sm501.h
4.63
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smc911x.h
255
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smc91x.h
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Save
Rename
#ifndef __LINUX_USB_H #define __LINUX_USB_H #include <linux/mod_devicetable.h> #include <linux/usb/ch9.h> #define USB_MAJOR 180 #define USB_DEVICE_MAJOR 189 #ifdef __KERNEL__ #include <linux/errno.h> /* for -ENODEV */ #include <linux/delay.h> /* for mdelay() */ #include <linux/interrupt.h> /* for in_interrupt() */ #include <linux/list.h> /* for struct list_head */ #include <linux/kref.h> /* for struct kref */ #include <linux/device.h> /* for struct device */ #include <linux/fs.h> /* for struct file_operations */ #include <linux/completion.h> /* for struct completion */ #include <linux/sched.h> /* for current && schedule_timeout */ #include <linux/mutex.h> /* for struct mutex */ #include <linux/pm_runtime.h> /* for runtime PM */ struct usb_device; struct usb_driver; struct wusb_dev; /*-------------------------------------------------------------------------*/ /* * Host-side wrappers for standard USB descriptors ... these are parsed * from the data provided by devices. Parsing turns them from a flat * sequence of descriptors into a hierarchy: * * - devices have one (usually) or more configs; * - configs have one (often) or more interfaces; * - interfaces have one (usually) or more settings; * - each interface setting has zero or (usually) more endpoints. * - a SuperSpeed endpoint has a companion descriptor * * And there might be other descriptors mixed in with those. * * Devices may also have class-specific or vendor-specific descriptors. */ struct ep_device; /** * struct usb_host_endpoint - host-side endpoint descriptor and queue * @desc: descriptor for this endpoint, wMaxPacketSize in native byteorder * @ss_ep_comp: SuperSpeed companion descriptor for this endpoint * @ssp_isoc_ep_comp: SuperSpeedPlus isoc companion descriptor for this endpoint * @urb_list: urbs queued to this endpoint; maintained by usbcore * @hcpriv: for use by HCD; typically holds hardware dma queue head (QH) * with one or more transfer descriptors (TDs) per urb * @ep_dev: ep_device for sysfs info * @extra: descriptors following this endpoint in the configuration * @extralen: how many bytes of "extra" are valid * @enabled: URBs may be submitted to this endpoint * @streams: number of USB-3 streams allocated on the endpoint * * USB requests are always queued to a given endpoint, identified by a * descriptor within an active interface in a given USB configuration. */ struct usb_host_endpoint { struct usb_endpoint_descriptor desc; struct usb_ss_ep_comp_descriptor ss_ep_comp; struct usb_ssp_isoc_ep_comp_descriptor ssp_isoc_ep_comp; struct list_head urb_list; void *hcpriv; struct ep_device *ep_dev; /* For sysfs info */ unsigned char *extra; /* Extra descriptors */ int extralen; int enabled; int streams; }; /* host-side wrapper for one interface setting's parsed descriptors */ struct usb_host_interface { struct usb_interface_descriptor desc; int extralen; unsigned char *extra; /* Extra descriptors */ /* array of desc.bNumEndpoints endpoints associated with this * interface setting. these will be in no particular order. */ struct usb_host_endpoint *endpoint; char *string; /* iInterface string, if present */ }; enum usb_interface_condition { USB_INTERFACE_UNBOUND = 0, USB_INTERFACE_BINDING, USB_INTERFACE_BOUND, USB_INTERFACE_UNBINDING, }; /** * struct usb_interface - what usb device drivers talk to * @altsetting: array of interface structures, one for each alternate * setting that may be selected. Each one includes a set of * endpoint configurations. They will be in no particular order. * @cur_altsetting: the current altsetting. * @num_altsetting: number of altsettings defined. * @intf_assoc: interface association descriptor * @minor: the minor number assigned to this interface, if this * interface is bound to a driver that uses the USB major number. * If this interface does not use the USB major, this field should * be unused. The driver should set this value in the probe() * function of the driver, after it has been assigned a minor * number from the USB core by calling usb_register_dev(). * @condition: binding state of the interface: not bound, binding * (in probe()), bound to a driver, or unbinding (in disconnect()) * @sysfs_files_created: sysfs attributes exist * @ep_devs_created: endpoint child pseudo-devices exist * @unregistering: flag set when the interface is being unregistered * @needs_remote_wakeup: flag set when the driver requires remote-wakeup * capability during autosuspend. * @needs_altsetting0: flag set when a set-interface request for altsetting 0 * has been deferred. * @needs_binding: flag set when the driver should be re-probed or unbound * following a reset or suspend operation it doesn't support. * @authorized: This allows to (de)authorize individual interfaces instead * a whole device in contrast to the device authorization. * @dev: driver model's view of this device * @usb_dev: if an interface is bound to the USB major, this will point * to the sysfs representation for that device. * @pm_usage_cnt: PM usage counter for this interface * @reset_ws: Used for scheduling resets from atomic context. * @resetting_device: USB core reset the device, so use alt setting 0 as * current; needs bandwidth alloc after reset. * * USB device drivers attach to interfaces on a physical device. Each * interface encapsulates a single high level function, such as feeding * an audio stream to a speaker or reporting a change in a volume control. * Many USB devices only have one interface. The protocol used to talk to * an interface's endpoints can be defined in a usb "class" specification, * or by a product's vendor. The (default) control endpoint is part of * every interface, but is never listed among the interface's descriptors. * * The driver that is bound to the interface can use standard driver model * calls such as dev_get_drvdata() on the dev member of this structure. * * Each interface may have alternate settings. The initial configuration * of a device sets altsetting 0, but the device driver can change * that setting using usb_set_interface(). Alternate settings are often * used to control the use of periodic endpoints, such as by having * different endpoints use different amounts of reserved USB bandwidth. * All standards-conformant USB devices that use isochronous endpoints * will use them in non-default settings. * * The USB specification says that alternate setting numbers must run from * 0 to one less than the total number of alternate settings. But some * devices manage to mess this up, and the structures aren't necessarily * stored in numerical order anyhow. Use usb_altnum_to_altsetting() to * look up an alternate setting in the altsetting array based on its number. */ struct usb_interface { /* array of alternate settings for this interface, * stored in no particular order */ struct usb_host_interface *altsetting; struct usb_host_interface *cur_altsetting; /* the currently * active alternate setting */ unsigned num_altsetting; /* number of alternate settings */ /* If there is an interface association descriptor then it will list * the associated interfaces */ struct usb_interface_assoc_descriptor *intf_assoc; int minor; /* minor number this interface is * bound to */ enum usb_interface_condition condition; /* state of binding */ unsigned sysfs_files_created:1; /* the sysfs attributes exist */ unsigned ep_devs_created:1; /* endpoint "devices" exist */ unsigned unregistering:1; /* unregistration is in progress */ unsigned needs_remote_wakeup:1; /* driver requires remote wakeup */ unsigned needs_altsetting0:1; /* switch to altsetting 0 is pending */ unsigned needs_binding:1; /* needs delayed unbind/rebind */ unsigned resetting_device:1; /* true: bandwidth alloc after reset */ unsigned authorized:1; /* used for interface authorization */ struct device dev; /* interface specific device info */ struct device *usb_dev; atomic_t pm_usage_cnt; /* usage counter for autosuspend */ struct work_struct reset_ws; /* for resets in atomic context */ }; #define to_usb_interface(d) container_of(d, struct usb_interface, dev) static inline void *usb_get_intfdata(struct usb_interface *intf) { return dev_get_drvdata(&intf->dev); } static inline void usb_set_intfdata(struct usb_interface *intf, void *data) { dev_set_drvdata(&intf->dev, data); } struct usb_interface *usb_get_intf(struct usb_interface *intf); void usb_put_intf(struct usb_interface *intf); /* Hard limit */ #define USB_MAXENDPOINTS 30 /* this maximum is arbitrary */ #define USB_MAXINTERFACES 32 #define USB_MAXIADS (USB_MAXINTERFACES/2) /* * USB Resume Timer: Every Host controller driver should drive the resume * signalling on the bus for the amount of time defined by this macro. * * That way we will have a 'stable' behavior among all HCDs supported by Linux. * * Note that the USB Specification states we should drive resume for *at least* * 20 ms, but it doesn't give an upper bound. This creates two possible * situations which we want to avoid: * * (a) sometimes an msleep(20) might expire slightly before 20 ms, which causes * us to fail USB Electrical Tests, thus failing Certification * * (b) Some (many) devices actually need more than 20 ms of resume signalling, * and while we can argue that's against the USB Specification, we don't have * control over which devices a certification laboratory will be using for * certification. If CertLab uses a device which was tested against Windows and * that happens to have relaxed resume signalling rules, we might fall into * situations where we fail interoperability and electrical tests. * * In order to avoid both conditions, we're using a 40 ms resume timeout, which * should cope with both LPJ calibration errors and devices not following every * detail of the USB Specification. */ #define USB_RESUME_TIMEOUT 40 /* ms */ /** * struct usb_interface_cache - long-term representation of a device interface * @num_altsetting: number of altsettings defined. * @ref: reference counter. * @altsetting: variable-length array of interface structures, one for * each alternate setting that may be selected. Each one includes a * set of endpoint configurations. They will be in no particular order. * * These structures persist for the lifetime of a usb_device, unlike * struct usb_interface (which persists only as long as its configuration * is installed). The altsetting arrays can be accessed through these * structures at any time, permitting comparison of configurations and * providing support for the /proc/bus/usb/devices pseudo-file. */ struct usb_interface_cache { unsigned num_altsetting; /* number of alternate settings */ struct kref ref; /* reference counter */ /* variable-length array of alternate settings for this interface, * stored in no particular order */ struct usb_host_interface altsetting[0]; }; #define ref_to_usb_interface_cache(r) \ container_of(r, struct usb_interface_cache, ref) #define altsetting_to_usb_interface_cache(a) \ container_of(a, struct usb_interface_cache, altsetting[0]) /** * struct usb_host_config - representation of a device's configuration * @desc: the device's configuration descriptor. * @string: pointer to the cached version of the iConfiguration string, if * present for this configuration. * @intf_assoc: list of any interface association descriptors in this config * @interface: array of pointers to usb_interface structures, one for each * interface in the configuration. The number of interfaces is stored * in desc.bNumInterfaces. These pointers are valid only while the * the configuration is active. * @intf_cache: array of pointers to usb_interface_cache structures, one * for each interface in the configuration. These structures exist * for the entire life of the device. * @extra: pointer to buffer containing all extra descriptors associated * with this configuration (those preceding the first interface * descriptor). * @extralen: length of the extra descriptors buffer. * * USB devices may have multiple configurations, but only one can be active * at any time. Each encapsulates a different operational environment; * for example, a dual-speed device would have separate configurations for * full-speed and high-speed operation. The number of configurations * available is stored in the device descriptor as bNumConfigurations. * * A configuration can contain multiple interfaces. Each corresponds to * a different function of the USB device, and all are available whenever * the configuration is active. The USB standard says that interfaces * are supposed to be numbered from 0 to desc.bNumInterfaces-1, but a lot * of devices get this wrong. In addition, the interface array is not * guaranteed to be sorted in numerical order. Use usb_ifnum_to_if() to * look up an interface entry based on its number. * * Device drivers should not attempt to activate configurations. The choice * of which configuration to install is a policy decision based on such * considerations as available power, functionality provided, and the user's * desires (expressed through userspace tools). However, drivers can call * usb_reset_configuration() to reinitialize the current configuration and * all its interfaces. */ struct usb_host_config { struct usb_config_descriptor desc; char *string; /* iConfiguration string, if present */ /* List of any Interface Association Descriptors in this * configuration. */ struct usb_interface_assoc_descriptor *intf_assoc[USB_MAXIADS]; /* the interfaces associated with this configuration, * stored in no particular order */ struct usb_interface *interface[USB_MAXINTERFACES]; /* Interface information available even when this is not the * active configuration */ struct usb_interface_cache *intf_cache[USB_MAXINTERFACES]; unsigned char *extra; /* Extra descriptors */ int extralen; }; /* USB2.0 and USB3.0 device BOS descriptor set */ struct usb_host_bos { struct usb_bos_descriptor *desc; /* wireless cap descriptor is handled by wusb */ struct usb_ext_cap_descriptor *ext_cap; struct usb_ss_cap_descriptor *ss_cap; struct usb_ssp_cap_descriptor *ssp_cap; struct usb_ss_container_id_descriptor *ss_id; struct usb_ptm_cap_descriptor *ptm_cap; }; int __usb_get_extra_descriptor(char *buffer, unsigned size, unsigned char type, void **ptr); #define usb_get_extra_descriptor(ifpoint, type, ptr) \ __usb_get_extra_descriptor((ifpoint)->extra, \ (ifpoint)->extralen, \ type, (void **)ptr) /* ----------------------------------------------------------------------- */ /* USB device number allocation bitmap */ struct usb_devmap { unsigned long devicemap[128 / (8*sizeof(unsigned long))]; }; /* * Allocated per bus (tree of devices) we have: */ struct usb_bus { struct device *controller; /* host/master side hardware */ int busnum; /* Bus number (in order of reg) */ const char *bus_name; /* stable id (PCI slot_name etc) */ u8 uses_dma; /* Does the host controller use DMA? */ u8 uses_pio_for_control; /* * Does the host controller use PIO * for control transfers? */ u8 otg_port; /* 0, or number of OTG/HNP port */ unsigned is_b_host:1; /* true during some HNP roleswitches */ unsigned b_hnp_enable:1; /* OTG: did A-Host enable HNP? */ unsigned no_stop_on_short:1; /* * Quirk: some controllers don't stop * the ep queue on a short transfer * with the URB_SHORT_NOT_OK flag set. */ unsigned no_sg_constraint:1; /* no sg constraint */ unsigned sg_tablesize; /* 0 or largest number of sg list entries */ int devnum_next; /* Next open device number in * round-robin allocation */ struct mutex devnum_next_mutex; /* devnum_next mutex */ struct usb_devmap devmap; /* device address allocation map */ struct usb_device *root_hub; /* Root hub */ struct usb_bus *hs_companion; /* Companion EHCI bus, if any */ struct list_head bus_list; /* list of busses */ int bandwidth_allocated; /* on this bus: how much of the time * reserved for periodic (intr/iso) * requests is used, on average? * Units: microseconds/frame. * Limits: Full/low speed reserve 90%, * while high speed reserves 80%. */ int bandwidth_int_reqs; /* number of Interrupt requests */ int bandwidth_isoc_reqs; /* number of Isoc. requests */ unsigned resuming_ports; /* bit array: resuming root-hub ports */ #if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) struct mon_bus *mon_bus; /* non-null when associated */ int monitored; /* non-zero when monitored */ #endif }; struct usb_dev_state; /* ----------------------------------------------------------------------- */ struct usb_tt; enum usb_device_removable { USB_DEVICE_REMOVABLE_UNKNOWN = 0, USB_DEVICE_REMOVABLE, USB_DEVICE_FIXED, }; enum usb_port_connect_type { USB_PORT_CONNECT_TYPE_UNKNOWN = 0, USB_PORT_CONNECT_TYPE_HOT_PLUG, USB_PORT_CONNECT_TYPE_HARD_WIRED, USB_PORT_NOT_USED, }; /* * USB 2.0 Link Power Management (LPM) parameters. */ struct usb2_lpm_parameters { /* Best effort service latency indicate how long the host will drive * resume on an exit from L1. */ unsigned int besl; /* Timeout value in microseconds for the L1 inactivity (LPM) timer. * When the timer counts to zero, the parent hub will initiate a LPM * transition to L1. */ int timeout; }; /* * USB 3.0 Link Power Management (LPM) parameters. * * PEL and SEL are USB 3.0 Link PM latencies for device-initiated LPM exit. * MEL is the USB 3.0 Link PM latency for host-initiated LPM exit. * All three are stored in nanoseconds. */ struct usb3_lpm_parameters { /* * Maximum exit latency (MEL) for the host to send a packet to the * device (either a Ping for isoc endpoints, or a data packet for * interrupt endpoints), the hubs to decode the packet, and for all hubs * in the path to transition the links to U0. */ unsigned int mel; /* * Maximum exit latency for a device-initiated LPM transition to bring * all links into U0. Abbreviated as "PEL" in section 9.4.12 of the USB * 3.0 spec, with no explanation of what "P" stands for. "Path"? */ unsigned int pel; /* * The System Exit Latency (SEL) includes PEL, and three other * latencies. After a device initiates a U0 transition, it will take * some time from when the device sends the ERDY to when it will finally * receive the data packet. Basically, SEL should be the worse-case * latency from when a device starts initiating a U0 transition to when * it will get data. */ unsigned int sel; /* * The idle timeout value that is currently programmed into the parent * hub for this device. When the timer counts to zero, the parent hub * will initiate an LPM transition to either U1 or U2. */ int timeout; }; /** * struct usb_device - kernel's representation of a USB device * @devnum: device number; address on a USB bus * @devpath: device ID string for use in messages (e.g., /port/...) * @route: tree topology hex string for use with xHCI * @state: device state: configured, not attached, etc. * @speed: device speed: high/full/low (or error) * @tt: Transaction Translator info; used with low/full speed dev, highspeed hub * @ttport: device port on that tt hub * @toggle: one bit for each endpoint, with ([0] = IN, [1] = OUT) endpoints * @parent: our hub, unless we're the root * @bus: bus we're part of * @ep0: endpoint 0 data (default control pipe) * @dev: generic device interface * @descriptor: USB device descriptor * @bos: USB device BOS descriptor set * @config: all of the device's configs * @actconfig: the active configuration * @ep_in: array of IN endpoints * @ep_out: array of OUT endpoints * @rawdescriptors: raw descriptors for each config * @bus_mA: Current available from the bus * @portnum: parent port number (origin 1) * @level: number of USB hub ancestors * @can_submit: URBs may be submitted * @persist_enabled: USB_PERSIST enabled for this device * @have_langid: whether string_langid is valid * @authorized: policy has said we can use it; * (user space) policy determines if we authorize this device to be * used or not. By default, wired USB devices are authorized. * WUSB devices are not, until we authorize them from user space. * FIXME -- complete doc * @authenticated: Crypto authentication passed * @wusb: device is Wireless USB * @lpm_capable: device supports LPM * @usb2_hw_lpm_capable: device can perform USB2 hardware LPM * @usb2_hw_lpm_besl_capable: device can perform USB2 hardware BESL LPM * @usb2_hw_lpm_enabled: USB2 hardware LPM is enabled * @usb2_hw_lpm_allowed: Userspace allows USB 2.0 LPM to be enabled * @usb3_lpm_enabled: USB3 hardware LPM enabled * @usb3_lpm_u1_enabled: USB3 hardware U1 LPM enabled * @usb3_lpm_u2_enabled: USB3 hardware U2 LPM enabled * @string_langid: language ID for strings * @product: iProduct string, if present (static) * @manufacturer: iManufacturer string, if present (static) * @serial: iSerialNumber string, if present (static) * @filelist: usbfs files that are open to this device * @maxchild: number of ports if hub * @quirks: quirks of the whole device * @urbnum: number of URBs submitted for the whole device * @active_duration: total time device is not suspended * @connect_time: time device was first connected * @do_remote_wakeup: remote wakeup should be enabled * @reset_resume: needs reset instead of resume * @port_is_suspended: the upstream port is suspended (L2 or U3) * @wusb_dev: if this is a Wireless USB device, link to the WUSB * specific data for the device. * @slot_id: Slot ID assigned by xHCI * @removable: Device can be physically removed from this port * @l1_params: best effor service latency for USB2 L1 LPM state, and L1 timeout. * @u1_params: exit latencies for USB3 U1 LPM state, and hub-initiated timeout. * @u2_params: exit latencies for USB3 U2 LPM state, and hub-initiated timeout. * @lpm_disable_count: Ref count used by usb_disable_lpm() and usb_enable_lpm() * to keep track of the number of functions that require USB 3.0 Link Power * Management to be disabled for this usb_device. This count should only * be manipulated by those functions, with the bandwidth_mutex is held. * * Notes: * Usbcore drivers should not set usbdev->state directly. Instead use * usb_set_device_state(). */ struct usb_device { int devnum; char devpath[16]; u32 route; enum usb_device_state state; enum usb_device_speed speed; struct usb_tt *tt; int ttport; unsigned int toggle[2]; struct usb_device *parent; struct usb_bus *bus; struct usb_host_endpoint ep0; struct device dev; struct usb_device_descriptor descriptor; struct usb_host_bos *bos; struct usb_host_config *config; struct usb_host_config *actconfig; struct usb_host_endpoint *ep_in[16]; struct usb_host_endpoint *ep_out[16]; char **rawdescriptors; unsigned short bus_mA; u8 portnum; u8 level; unsigned can_submit:1; unsigned persist_enabled:1; unsigned have_langid:1; unsigned authorized:1; unsigned authenticated:1; unsigned wusb:1; unsigned lpm_capable:1; unsigned usb2_hw_lpm_capable:1; unsigned usb2_hw_lpm_besl_capable:1; unsigned usb2_hw_lpm_enabled:1; unsigned usb2_hw_lpm_allowed:1; unsigned usb3_lpm_enabled:1; unsigned usb3_lpm_u1_enabled:1; unsigned usb3_lpm_u2_enabled:1; int string_langid; /* static strings from the device */ char *product; char *manufacturer; char *serial; struct list_head filelist; int maxchild; u32 quirks; atomic_t urbnum; unsigned long active_duration; #ifdef CONFIG_PM unsigned long connect_time; unsigned do_remote_wakeup:1; unsigned reset_resume:1; unsigned port_is_suspended:1; #endif struct wusb_dev *wusb_dev; int slot_id; enum usb_device_removable removable; struct usb2_lpm_parameters l1_params; struct usb3_lpm_parameters u1_params; struct usb3_lpm_parameters u2_params; unsigned lpm_disable_count; }; #define to_usb_device(d) container_of(d, struct usb_device, dev) static inline struct usb_device *interface_to_usbdev(struct usb_interface *intf) { return to_usb_device(intf->dev.parent); } extern struct usb_device *usb_get_dev(struct usb_device *dev); extern void usb_put_dev(struct usb_device *dev); extern struct usb_device *usb_hub_find_child(struct usb_device *hdev, int port1); /** * usb_hub_for_each_child - iterate over all child devices on the hub * @hdev: USB device belonging to the usb hub * @port1: portnum associated with child device * @child: child device pointer */ #define usb_hub_for_each_child(hdev, port1, child) \ for (port1 = 1, child = usb_hub_find_child(hdev, port1); \ port1 <= hdev->maxchild; \ child = usb_hub_find_child(hdev, ++port1)) \ if (!child) continue; else /* USB device locking */ #define usb_lock_device(udev) device_lock(&(udev)->dev) #define usb_unlock_device(udev) device_unlock(&(udev)->dev) #define usb_trylock_device(udev) device_trylock(&(udev)->dev) extern int usb_lock_device_for_reset(struct usb_device *udev, const struct usb_interface *iface); /* USB port reset for device reinitialization */ extern int usb_reset_device(struct usb_device *dev); extern void usb_queue_reset_device(struct usb_interface *dev); #ifdef CONFIG_ACPI extern int usb_acpi_set_power_state(struct usb_device *hdev, int index, bool enable); extern bool usb_acpi_power_manageable(struct usb_device *hdev, int index); #else static inline int usb_acpi_set_power_state(struct usb_device *hdev, int index, bool enable) { return 0; } static inline bool usb_acpi_power_manageable(struct usb_device *hdev, int index) { return true; } #endif /* USB autosuspend and autoresume */ #ifdef CONFIG_PM extern void usb_enable_autosuspend(struct usb_device *udev); extern void usb_disable_autosuspend(struct usb_device *udev); extern int usb_autopm_get_interface(struct usb_interface *intf); extern void usb_autopm_put_interface(struct usb_interface *intf); extern int usb_autopm_get_interface_async(struct usb_interface *intf); extern void usb_autopm_put_interface_async(struct usb_interface *intf); extern void usb_autopm_get_interface_no_resume(struct usb_interface *intf); extern void usb_autopm_put_interface_no_suspend(struct usb_interface *intf); static inline void usb_mark_last_busy(struct usb_device *udev) { pm_runtime_mark_last_busy(&udev->dev); } #else static inline int usb_enable_autosuspend(struct usb_device *udev) { return 0; } static inline int usb_disable_autosuspend(struct usb_device *udev) { return 0; } static inline int usb_autopm_get_interface(struct usb_interface *intf) { return 0; } static inline int usb_autopm_get_interface_async(struct usb_interface *intf) { return 0; } static inline void usb_autopm_put_interface(struct usb_interface *intf) { } static inline void usb_autopm_put_interface_async(struct usb_interface *intf) { } static inline void usb_autopm_get_interface_no_resume( struct usb_interface *intf) { } static inline void usb_autopm_put_interface_no_suspend( struct usb_interface *intf) { } static inline void usb_mark_last_busy(struct usb_device *udev) { } #endif extern int usb_disable_lpm(struct usb_device *udev); extern void usb_enable_lpm(struct usb_device *udev); /* Same as above, but these functions lock/unlock the bandwidth_mutex. */ extern int usb_unlocked_disable_lpm(struct usb_device *udev); extern void usb_unlocked_enable_lpm(struct usb_device *udev); extern int usb_disable_ltm(struct usb_device *udev); extern void usb_enable_ltm(struct usb_device *udev); static inline bool usb_device_supports_ltm(struct usb_device *udev) { if (udev->speed != USB_SPEED_SUPER || !udev->bos || !udev->bos->ss_cap) return false; return udev->bos->ss_cap->bmAttributes & USB_LTM_SUPPORT; } static inline bool usb_device_no_sg_constraint(struct usb_device *udev) { return udev && udev->bus && udev->bus->no_sg_constraint; } /*-------------------------------------------------------------------------*/ /* for drivers using iso endpoints */ extern int usb_get_current_frame_number(struct usb_device *usb_dev); /* Sets up a group of bulk endpoints to support multiple stream IDs. */ extern int usb_alloc_streams(struct usb_interface *interface, struct usb_host_endpoint **eps, unsigned int num_eps, unsigned int num_streams, gfp_t mem_flags); /* Reverts a group of bulk endpoints back to not using stream IDs. */ extern int usb_free_streams(struct usb_interface *interface, struct usb_host_endpoint **eps, unsigned int num_eps, gfp_t mem_flags); /* used these for multi-interface device registration */ extern int usb_driver_claim_interface(struct usb_driver *driver, struct usb_interface *iface, void *priv); /** * usb_interface_claimed - returns true iff an interface is claimed * @iface: the interface being checked * * Return: %true (nonzero) iff the interface is claimed, else %false * (zero). * * Note: * Callers must own the driver model's usb bus readlock. So driver * probe() entries don't need extra locking, but other call contexts * may need to explicitly claim that lock. * */ static inline int usb_interface_claimed(struct usb_interface *iface) { return (iface->dev.driver != NULL); } extern void usb_driver_release_interface(struct usb_driver *driver, struct usb_interface *iface); const struct usb_device_id *usb_match_id(struct usb_interface *interface, const struct usb_device_id *id); extern int usb_match_one_id(struct usb_interface *interface, const struct usb_device_id *id); extern int usb_for_each_dev(void *data, int (*fn)(struct usb_device *, void *)); extern struct usb_interface *usb_find_interface(struct usb_driver *drv, int minor); extern struct usb_interface *usb_ifnum_to_if(const struct usb_device *dev, unsigned ifnum); extern struct usb_host_interface *usb_altnum_to_altsetting( const struct usb_interface *intf, unsigned int altnum); extern struct usb_host_interface *usb_find_alt_setting( struct usb_host_config *config, unsigned int iface_num, unsigned int alt_num); /* port claiming functions */ int usb_hub_claim_port(struct usb_device *hdev, unsigned port1, struct usb_dev_state *owner); int usb_hub_release_port(struct usb_device *hdev, unsigned port1, struct usb_dev_state *owner); /** * usb_make_path - returns stable device path in the usb tree * @dev: the device whose path is being constructed * @buf: where to put the string * @size: how big is "buf"? * * Return: Length of the string (> 0) or negative if size was too small. * * Note: * This identifier is intended to be "stable", reflecting physical paths in * hardware such as physical bus addresses for host controllers or ports on * USB hubs. That makes it stay the same until systems are physically * reconfigured, by re-cabling a tree of USB devices or by moving USB host * controllers. Adding and removing devices, including virtual root hubs * in host controller driver modules, does not change these path identifiers; * neither does rebooting or re-enumerating. These are more useful identifiers * than changeable ("unstable") ones like bus numbers or device addresses. * * With a partial exception for devices connected to USB 2.0 root hubs, these * identifiers are also predictable. So long as the device tree isn't changed, * plugging any USB device into a given hub port always gives it the same path. * Because of the use of "companion" controllers, devices connected to ports on * USB 2.0 root hubs (EHCI host controllers) will get one path ID if they are * high speed, and a different one if they are full or low speed. */ static inline int usb_make_path(struct usb_device *dev, char *buf, size_t size) { int actual; actual = snprintf(buf, size, "usb-%s-%s", dev->bus->bus_name, dev->devpath); return (actual >= (int)size) ? -1 : actual; } /*-------------------------------------------------------------------------*/ #define USB_DEVICE_ID_MATCH_DEVICE \ (USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_PRODUCT) #define USB_DEVICE_ID_MATCH_DEV_RANGE \ (USB_DEVICE_ID_MATCH_DEV_LO | USB_DEVICE_ID_MATCH_DEV_HI) #define USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION \ (USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_DEV_RANGE) #define USB_DEVICE_ID_MATCH_DEV_INFO \ (USB_DEVICE_ID_MATCH_DEV_CLASS | \ USB_DEVICE_ID_MATCH_DEV_SUBCLASS | \ USB_DEVICE_ID_MATCH_DEV_PROTOCOL) #define USB_DEVICE_ID_MATCH_INT_INFO \ (USB_DEVICE_ID_MATCH_INT_CLASS | \ USB_DEVICE_ID_MATCH_INT_SUBCLASS | \ USB_DEVICE_ID_MATCH_INT_PROTOCOL) /** * USB_DEVICE - macro used to describe a specific usb device * @vend: the 16 bit USB Vendor ID * @prod: the 16 bit USB Product ID * * This macro is used to create a struct usb_device_id that matches a * specific device. */ #define USB_DEVICE(vend, prod) \ .match_flags = USB_DEVICE_ID_MATCH_DEVICE, \ .idVendor = (vend), \ .idProduct = (prod) /** * USB_DEVICE_VER - describe a specific usb device with a version range * @vend: the 16 bit USB Vendor ID * @prod: the 16 bit USB Product ID * @lo: the bcdDevice_lo value * @hi: the bcdDevice_hi value * * This macro is used to create a struct usb_device_id that matches a * specific device, with a version range. */ #define USB_DEVICE_VER(vend, prod, lo, hi) \ .match_flags = USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION, \ .idVendor = (vend), \ .idProduct = (prod), \ .bcdDevice_lo = (lo), \ .bcdDevice_hi = (hi) /** * USB_DEVICE_INTERFACE_CLASS - describe a usb device with a specific interface class * @vend: the 16 bit USB Vendor ID * @prod: the 16 bit USB Product ID * @cl: bInterfaceClass value * * This macro is used to create a struct usb_device_id that matches a * specific interface class of devices. */ #define USB_DEVICE_INTERFACE_CLASS(vend, prod, cl) \ .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \ USB_DEVICE_ID_MATCH_INT_CLASS, \ .idVendor = (vend), \ .idProduct = (prod), \ .bInterfaceClass = (cl) /** * USB_DEVICE_INTERFACE_PROTOCOL - describe a usb device with a specific interface protocol * @vend: the 16 bit USB Vendor ID * @prod: the 16 bit USB Product ID * @pr: bInterfaceProtocol value * * This macro is used to create a struct usb_device_id that matches a * specific interface protocol of devices. */ #define USB_DEVICE_INTERFACE_PROTOCOL(vend, prod, pr) \ .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \ USB_DEVICE_ID_MATCH_INT_PROTOCOL, \ .idVendor = (vend), \ .idProduct = (prod), \ .bInterfaceProtocol = (pr) /** * USB_DEVICE_INTERFACE_NUMBER - describe a usb device with a specific interface number * @vend: the 16 bit USB Vendor ID * @prod: the 16 bit USB Product ID * @num: bInterfaceNumber value * * This macro is used to create a struct usb_device_id that matches a * specific interface number of devices. */ #define USB_DEVICE_INTERFACE_NUMBER(vend, prod, num) \ .match_flags = USB_DEVICE_ID_MATCH_DEVICE | \ USB_DEVICE_ID_MATCH_INT_NUMBER, \ .idVendor = (vend), \ .idProduct = (prod), \ .bInterfaceNumber = (num) /** * USB_DEVICE_INFO - macro used to describe a class of usb devices * @cl: bDeviceClass value * @sc: bDeviceSubClass value * @pr: bDeviceProtocol value * * This macro is used to create a struct usb_device_id that matches a * specific class of devices. */ #define USB_DEVICE_INFO(cl, sc, pr) \ .match_flags = USB_DEVICE_ID_MATCH_DEV_INFO, \ .bDeviceClass = (cl), \ .bDeviceSubClass = (sc), \ .bDeviceProtocol = (pr) /** * USB_INTERFACE_INFO - macro used to describe a class of usb interfaces * @cl: bInterfaceClass value * @sc: bInterfaceSubClass value * @pr: bInterfaceProtocol value * * This macro is used to create a struct usb_device_id that matches a * specific class of interfaces. */ #define USB_INTERFACE_INFO(cl, sc, pr) \ .match_flags = USB_DEVICE_ID_MATCH_INT_INFO, \ .bInterfaceClass = (cl), \ .bInterfaceSubClass = (sc), \ .bInterfaceProtocol = (pr) /** * USB_DEVICE_AND_INTERFACE_INFO - describe a specific usb device with a class of usb interfaces * @vend: the 16 bit USB Vendor ID * @prod: the 16 bit USB Product ID * @cl: bInterfaceClass value * @sc: bInterfaceSubClass value * @pr: bInterfaceProtocol value * * This macro is used to create a struct usb_device_id that matches a * specific device with a specific class of interfaces. * * This is especially useful when explicitly matching devices that have * vendor specific bDeviceClass values, but standards-compliant interfaces. */ #define USB_DEVICE_AND_INTERFACE_INFO(vend, prod, cl, sc, pr) \ .match_flags = USB_DEVICE_ID_MATCH_INT_INFO \ | USB_DEVICE_ID_MATCH_DEVICE, \ .idVendor = (vend), \ .idProduct = (prod), \ .bInterfaceClass = (cl), \ .bInterfaceSubClass = (sc), \ .bInterfaceProtocol = (pr) /** * USB_VENDOR_AND_INTERFACE_INFO - describe a specific usb vendor with a class of usb interfaces * @vend: the 16 bit USB Vendor ID * @cl: bInterfaceClass value * @sc: bInterfaceSubClass value * @pr: bInterfaceProtocol value * * This macro is used to create a struct usb_device_id that matches a * specific vendor with a specific class of interfaces. * * This is especially useful when explicitly matching devices that have * vendor specific bDeviceClass values, but standards-compliant interfaces. */ #define USB_VENDOR_AND_INTERFACE_INFO(vend, cl, sc, pr) \ .match_flags = USB_DEVICE_ID_MATCH_INT_INFO \ | USB_DEVICE_ID_MATCH_VENDOR, \ .idVendor = (vend), \ .bInterfaceClass = (cl), \ .bInterfaceSubClass = (sc), \ .bInterfaceProtocol = (pr) /* ----------------------------------------------------------------------- */ /* Stuff for dynamic usb ids */ struct usb_dynids { spinlock_t lock; struct list_head list; }; struct usb_dynid { struct list_head node; struct usb_device_id id; }; extern ssize_t usb_store_new_id(struct usb_dynids *dynids, const struct usb_device_id *id_table, struct device_driver *driver, const char *buf, size_t count); extern ssize_t usb_show_dynids(struct usb_dynids *dynids, char *buf); /** * struct usbdrv_wrap - wrapper for driver-model structure * @driver: The driver-model core driver structure. * @for_devices: Non-zero for device drivers, 0 for interface drivers. */ struct usbdrv_wrap { struct device_driver driver; int for_devices; }; /** * struct usb_driver - identifies USB interface driver to usbcore * @name: The driver name should be unique among USB drivers, * and should normally be the same as the module name. * @probe: Called to see if the driver is willing to manage a particular * interface on a device. If it is, probe returns zero and uses * usb_set_intfdata() to associate driver-specific data with the * interface. It may also use usb_set_interface() to specify the * appropriate altsetting. If unwilling to manage the interface, * return -ENODEV, if genuine IO errors occurred, an appropriate * negative errno value. * @disconnect: Called when the interface is no longer accessible, usually * because its device has been (or is being) disconnected or the * driver module is being unloaded. * @unlocked_ioctl: Used for drivers that want to talk to userspace through * the "usbfs" filesystem. This lets devices provide ways to * expose information to user space regardless of where they * do (or don't) show up otherwise in the filesystem. * @suspend: Called when the device is going to be suspended by the * system either from system sleep or runtime suspend context. The * return value will be ignored in system sleep context, so do NOT * try to continue using the device if suspend fails in this case. * Instead, let the resume or reset-resume routine recover from * the failure. * @resume: Called when the device is being resumed by the system. * @reset_resume: Called when the suspended device has been reset instead * of being resumed. * @pre_reset: Called by usb_reset_device() when the device is about to be * reset. This routine must not return until the driver has no active * URBs for the device, and no more URBs may be submitted until the * post_reset method is called. * @post_reset: Called by usb_reset_device() after the device * has been reset * @id_table: USB drivers use ID table to support hotplugging. * Export this with MODULE_DEVICE_TABLE(usb,...). This must be set * or your driver's probe function will never get called. * @dynids: used internally to hold the list of dynamically added device * ids for this driver. * @drvwrap: Driver-model core structure wrapper. * @no_dynamic_id: if set to 1, the USB core will not allow dynamic ids to be * added to this driver by preventing the sysfs file from being created. * @supports_autosuspend: if set to 0, the USB core will not allow autosuspend * for interfaces bound to this driver. * @soft_unbind: if set to 1, the USB core will not kill URBs and disable * endpoints before calling the driver's disconnect method. * @disable_hub_initiated_lpm: if set to 1, the USB core will not allow hubs * to initiate lower power link state transitions when an idle timeout * occurs. Device-initiated USB 3.0 link PM will still be allowed. * * USB interface drivers must provide a name, probe() and disconnect() * methods, and an id_table. Other driver fields are optional. * * The id_table is used in hotplugging. It holds a set of descriptors, * and specialized data may be associated with each entry. That table * is used by both user and kernel mode hotplugging support. * * The probe() and disconnect() methods are called in a context where * they can sleep, but they should avoid abusing the privilege. Most * work to connect to a device should be done when the device is opened, * and undone at the last close. The disconnect code needs to address * concurrency issues with respect to open() and close() methods, as * well as forcing all pending I/O requests to complete (by unlinking * them as necessary, and blocking until the unlinks complete). */ struct usb_driver { const char *name; int (*probe) (struct usb_interface *intf, const struct usb_device_id *id); void (*disconnect) (struct usb_interface *intf); int (*unlocked_ioctl) (struct usb_interface *intf, unsigned int code, void *buf); int (*suspend) (struct usb_interface *intf, pm_message_t message); int (*resume) (struct usb_interface *intf); int (*reset_resume)(struct usb_interface *intf); int (*pre_reset)(struct usb_interface *intf); int (*post_reset)(struct usb_interface *intf); const struct usb_device_id *id_table; struct usb_dynids dynids; struct usbdrv_wrap drvwrap; unsigned int no_dynamic_id:1; unsigned int supports_autosuspend:1; unsigned int disable_hub_initiated_lpm:1; unsigned int soft_unbind:1; }; #define to_usb_driver(d) container_of(d, struct usb_driver, drvwrap.driver) /** * struct usb_device_driver - identifies USB device driver to usbcore * @name: The driver name should be unique among USB drivers, * and should normally be the same as the module name. * @probe: Called to see if the driver is willing to manage a particular * device. If it is, probe returns zero and uses dev_set_drvdata() * to associate driver-specific data with the device. If unwilling * to manage the device, return a negative errno value. * @disconnect: Called when the device is no longer accessible, usually * because it has been (or is being) disconnected or the driver's * module is being unloaded. * @suspend: Called when the device is going to be suspended by the system. * @resume: Called when the device is being resumed by the system. * @drvwrap: Driver-model core structure wrapper. * @supports_autosuspend: if set to 0, the USB core will not allow autosuspend * for devices bound to this driver. * * USB drivers must provide all the fields listed above except drvwrap. */ struct usb_device_driver { const char *name; int (*probe) (struct usb_device *udev); void (*disconnect) (struct usb_device *udev); int (*suspend) (struct usb_device *udev, pm_message_t message); int (*resume) (struct usb_device *udev, pm_message_t message); struct usbdrv_wrap drvwrap; unsigned int supports_autosuspend:1; }; #define to_usb_device_driver(d) container_of(d, struct usb_device_driver, \ drvwrap.driver) extern struct bus_type usb_bus_type; /** * struct usb_class_driver - identifies a USB driver that wants to use the USB major number * @name: the usb class device name for this driver. Will show up in sysfs. * @devnode: Callback to provide a naming hint for a possible * device node to create. * @fops: pointer to the struct file_operations of this driver. * @minor_base: the start of the minor range for this driver. * * This structure is used for the usb_register_dev() and * usb_unregister_dev() functions, to consolidate a number of the * parameters used for them. */ struct usb_class_driver { char *name; char *(*devnode)(struct device *dev, umode_t *mode); const struct file_operations *fops; int minor_base; }; /* * use these in module_init()/module_exit() * and don't forget MODULE_DEVICE_TABLE(usb, ...) */ extern int usb_register_driver(struct usb_driver *, struct module *, const char *); /* use a define to avoid include chaining to get THIS_MODULE & friends */ #define usb_register(driver) \ usb_register_driver(driver, THIS_MODULE, KBUILD_MODNAME) extern void usb_deregister(struct usb_driver *); /** * module_usb_driver() - Helper macro for registering a USB driver * @__usb_driver: usb_driver struct * * Helper macro for USB drivers which do not do anything special in module * init/exit. This eliminates a lot of boilerplate. Each module may only * use this macro once, and calling it replaces module_init() and module_exit() */ #define module_usb_driver(__usb_driver) \ module_driver(__usb_driver, usb_register, \ usb_deregister) extern int usb_register_device_driver(struct usb_device_driver *, struct module *); extern void usb_deregister_device_driver(struct usb_device_driver *); extern int usb_register_dev(struct usb_interface *intf, struct usb_class_driver *class_driver); extern void usb_deregister_dev(struct usb_interface *intf, struct usb_class_driver *class_driver); extern int usb_disabled(void); /* ----------------------------------------------------------------------- */ /* * URB support, for asynchronous request completions */ /* * urb->transfer_flags: * * Note: URB_DIR_IN/OUT is automatically set in usb_submit_urb(). */ #define URB_SHORT_NOT_OK 0x0001 /* report short reads as errors */ #define URB_ISO_ASAP 0x0002 /* iso-only; use the first unexpired * slot in the schedule */ #define URB_NO_TRANSFER_DMA_MAP 0x0004 /* urb->transfer_dma valid on submit */ #define URB_NO_FSBR 0x0020 /* UHCI-specific */ #define URB_ZERO_PACKET 0x0040 /* Finish bulk OUT with short packet */ #define URB_NO_INTERRUPT 0x0080 /* HINT: no non-error interrupt * needed */ #define URB_FREE_BUFFER 0x0100 /* Free transfer buffer with the URB */ /* The following flags are used internally by usbcore and HCDs */ #define URB_DIR_IN 0x0200 /* Transfer from device to host */ #define URB_DIR_OUT 0 #define URB_DIR_MASK URB_DIR_IN #define URB_DMA_MAP_SINGLE 0x00010000 /* Non-scatter-gather mapping */ #define URB_DMA_MAP_PAGE 0x00020000 /* HCD-unsupported S-G */ #define URB_DMA_MAP_SG 0x00040000 /* HCD-supported S-G */ #define URB_MAP_LOCAL 0x00080000 /* HCD-local-memory mapping */ #define URB_SETUP_MAP_SINGLE 0x00100000 /* Setup packet DMA mapped */ #define URB_SETUP_MAP_LOCAL 0x00200000 /* HCD-local setup packet */ #define URB_DMA_SG_COMBINED 0x00400000 /* S-G entries were combined */ #define URB_ALIGNED_TEMP_BUFFER 0x00800000 /* Temp buffer was alloc'd */ struct usb_iso_packet_descriptor { unsigned int offset; unsigned int length; /* expected length */ unsigned int actual_length; int status; }; struct urb; struct usb_anchor { struct list_head urb_list; wait_queue_head_t wait; spinlock_t lock; atomic_t suspend_wakeups; unsigned int poisoned:1; }; static inline void init_usb_anchor(struct usb_anchor *anchor) { memset(anchor, 0, sizeof(*anchor)); INIT_LIST_HEAD(&anchor->urb_list); init_waitqueue_head(&anchor->wait); spin_lock_init(&anchor->lock); } typedef void (*usb_complete_t)(struct urb *); /** * struct urb - USB Request Block * @urb_list: For use by current owner of the URB. * @anchor_list: membership in the list of an anchor * @anchor: to anchor URBs to a common mooring * @ep: Points to the endpoint's data structure. Will eventually * replace @pipe. * @pipe: Holds endpoint number, direction, type, and more. * Create these values with the eight macros available; * usb_{snd,rcv}TYPEpipe(dev,endpoint), where the TYPE is "ctrl" * (control), "bulk", "int" (interrupt), or "iso" (isochronous). * For example usb_sndbulkpipe() or usb_rcvintpipe(). Endpoint * numbers range from zero to fifteen. Note that "in" endpoint two * is a different endpoint (and pipe) from "out" endpoint two. * The current configuration controls the existence, type, and * maximum packet size of any given endpoint. * @stream_id: the endpoint's stream ID for bulk streams * @dev: Identifies the USB device to perform the request. * @status: This is read in non-iso completion functions to get the * status of the particular request. ISO requests only use it * to tell whether the URB was unlinked; detailed status for * each frame is in the fields of the iso_frame-desc. * @transfer_flags: A variety of flags may be used to affect how URB * submission, unlinking, or operation are handled. Different * kinds of URB can use different flags. * @transfer_buffer: This identifies the buffer to (or from) which the I/O * request will be performed unless URB_NO_TRANSFER_DMA_MAP is set * (however, do not leave garbage in transfer_buffer even then). * This buffer must be suitable for DMA; allocate it with * kmalloc() or equivalent. For transfers to "in" endpoints, contents * of this buffer will be modified. This buffer is used for the data * stage of control transfers. * @transfer_dma: When transfer_flags includes URB_NO_TRANSFER_DMA_MAP, * the device driver is saying that it provided this DMA address, * which the host controller driver should use in preference to the * transfer_buffer. * @sg: scatter gather buffer list, the buffer size of each element in * the list (except the last) must be divisible by the endpoint's * max packet size if no_sg_constraint isn't set in 'struct usb_bus' * @num_mapped_sgs: (internal) number of mapped sg entries * @num_sgs: number of entries in the sg list * @transfer_buffer_length: How big is transfer_buffer. The transfer may * be broken up into chunks according to the current maximum packet * size for the endpoint, which is a function of the configuration * and is encoded in the pipe. When the length is zero, neither * transfer_buffer nor transfer_dma is used. * @actual_length: This is read in non-iso completion functions, and * it tells how many bytes (out of transfer_buffer_length) were * transferred. It will normally be the same as requested, unless * either an error was reported or a short read was performed. * The URB_SHORT_NOT_OK transfer flag may be used to make such * short reads be reported as errors. * @setup_packet: Only used for control transfers, this points to eight bytes * of setup data. Control transfers always start by sending this data * to the device. Then transfer_buffer is read or written, if needed. * @setup_dma: DMA pointer for the setup packet. The caller must not use * this field; setup_packet must point to a valid buffer. * @start_frame: Returns the initial frame for isochronous transfers. * @number_of_packets: Lists the number of ISO transfer buffers. * @interval: Specifies the polling interval for interrupt or isochronous * transfers. The units are frames (milliseconds) for full and low * speed devices, and microframes (1/8 millisecond) for highspeed * and SuperSpeed devices. * @error_count: Returns the number of ISO transfers that reported errors. * @context: For use in completion functions. This normally points to * request-specific driver context. * @complete: Completion handler. This URB is passed as the parameter to the * completion function. The completion function may then do what * it likes with the URB, including resubmitting or freeing it. * @iso_frame_desc: Used to provide arrays of ISO transfer buffers and to * collect the transfer status for each buffer. * * This structure identifies USB transfer requests. URBs must be allocated by * calling usb_alloc_urb() and freed with a call to usb_free_urb(). * Initialization may be done using various usb_fill_*_urb() functions. URBs * are submitted using usb_submit_urb(), and pending requests may be canceled * using usb_unlink_urb() or usb_kill_urb(). * * Data Transfer Buffers: * * Normally drivers provide I/O buffers allocated with kmalloc() or otherwise * taken from the general page pool. That is provided by transfer_buffer * (control requests also use setup_packet), and host controller drivers * perform a dma mapping (and unmapping) for each buffer transferred. Those * mapping operations can be expensive on some platforms (perhaps using a dma * bounce buffer or talking to an IOMMU), * although they're cheap on commodity x86 and ppc hardware. * * Alternatively, drivers may pass the URB_NO_TRANSFER_DMA_MAP transfer flag, * which tells the host controller driver that no such mapping is needed for * the transfer_buffer since * the device driver is DMA-aware. For example, a device driver might * allocate a DMA buffer with usb_alloc_coherent() or call usb_buffer_map(). * When this transfer flag is provided, host controller drivers will * attempt to use the dma address found in the transfer_dma * field rather than determining a dma address themselves. * * Note that transfer_buffer must still be set if the controller * does not support DMA (as indicated by bus.uses_dma) and when talking * to root hub. If you have to trasfer between highmem zone and the device * on such controller, create a bounce buffer or bail out with an error. * If transfer_buffer cannot be set (is in highmem) and the controller is DMA * capable, assign NULL to it, so that usbmon knows not to use the value. * The setup_packet must always be set, so it cannot be located in highmem. * * Initialization: * * All URBs submitted must initialize the dev, pipe, transfer_flags (may be * zero), and complete fields. All URBs must also initialize * transfer_buffer and transfer_buffer_length. They may provide the * URB_SHORT_NOT_OK transfer flag, indicating that short reads are * to be treated as errors; that flag is invalid for write requests. * * Bulk URBs may * use the URB_ZERO_PACKET transfer flag, indicating that bulk OUT transfers * should always terminate with a short packet, even if it means adding an * extra zero length packet. * * Control URBs must provide a valid pointer in the setup_packet field. * Unlike the transfer_buffer, the setup_packet may not be mapped for DMA * beforehand. * * Interrupt URBs must provide an interval, saying how often (in milliseconds * or, for highspeed devices, 125 microsecond units) * to poll for transfers. After the URB has been submitted, the interval * field reflects how the transfer was actually scheduled. * The polling interval may be more frequent than requested. * For example, some controllers have a maximum interval of 32 milliseconds, * while others support intervals of up to 1024 milliseconds. * Isochronous URBs also have transfer intervals. (Note that for isochronous * endpoints, as well as high speed interrupt endpoints, the encoding of * the transfer interval in the endpoint descriptor is logarithmic. * Device drivers must convert that value to linear units themselves.) * * If an isochronous endpoint queue isn't already running, the host * controller will schedule a new URB to start as soon as bandwidth * utilization allows. If the queue is running then a new URB will be * scheduled to start in the first transfer slot following the end of the * preceding URB, if that slot has not already expired. If the slot has * expired (which can happen when IRQ delivery is delayed for a long time), * the scheduling behavior depends on the URB_ISO_ASAP flag. If the flag * is clear then the URB will be scheduled to start in the expired slot, * implying that some of its packets will not be transferred; if the flag * is set then the URB will be scheduled in the first unexpired slot, * breaking the queue's synchronization. Upon URB completion, the * start_frame field will be set to the (micro)frame number in which the * transfer was scheduled. Ranges for frame counter values are HC-specific * and can go from as low as 256 to as high as 65536 frames. * * Isochronous URBs have a different data transfer model, in part because * the quality of service is only "best effort". Callers provide specially * allocated URBs, with number_of_packets worth of iso_frame_desc structures * at the end. Each such packet is an individual ISO transfer. Isochronous * URBs are normally queued, submitted by drivers to arrange that * transfers are at least double buffered, and then explicitly resubmitted * in completion handlers, so * that data (such as audio or video) streams at as constant a rate as the * host controller scheduler can support. * * Completion Callbacks: * * The completion callback is made in_interrupt(), and one of the first * things that a completion handler should do is check the status field. * The status field is provided for all URBs. It is used to report * unlinked URBs, and status for all non-ISO transfers. It should not * be examined before the URB is returned to the completion handler. * * The context field is normally used to link URBs back to the relevant * driver or request state. * * When the completion callback is invoked for non-isochronous URBs, the * actual_length field tells how many bytes were transferred. This field * is updated even when the URB terminated with an error or was unlinked. * * ISO transfer status is reported in the status and actual_length fields * of the iso_frame_desc array, and the number of errors is reported in * error_count. Completion callbacks for ISO transfers will normally * (re)submit URBs to ensure a constant transfer rate. * * Note that even fields marked "public" should not be touched by the driver * when the urb is owned by the hcd, that is, since the call to * usb_submit_urb() till the entry into the completion routine. */ struct urb { /* private: usb core and host controller only fields in the urb */ struct kref kref; /* reference count of the URB */ void *hcpriv; /* private data for host controller */ atomic_t use_count; /* concurrent submissions counter */ atomic_t reject; /* submissions will fail */ int unlinked; /* unlink error code */ /* public: documented fields in the urb that can be used by drivers */ struct list_head urb_list; /* list head for use by the urb's * current owner */ struct list_head anchor_list; /* the URB may be anchored */ struct usb_anchor *anchor; struct usb_device *dev; /* (in) pointer to associated device */ struct usb_host_endpoint *ep; /* (internal) pointer to endpoint */ unsigned int pipe; /* (in) pipe information */ unsigned int stream_id; /* (in) stream ID */ int status; /* (return) non-ISO status */ unsigned int transfer_flags; /* (in) URB_SHORT_NOT_OK | ...*/ void *transfer_buffer; /* (in) associated data buffer */ dma_addr_t transfer_dma; /* (in) dma addr for transfer_buffer */ struct scatterlist *sg; /* (in) scatter gather buffer list */ int num_mapped_sgs; /* (internal) mapped sg entries */ int num_sgs; /* (in) number of entries in the sg list */ u32 transfer_buffer_length; /* (in) data buffer length */ u32 actual_length; /* (return) actual transfer length */ unsigned char *setup_packet; /* (in) setup packet (control only) */ dma_addr_t setup_dma; /* (in) dma addr for setup_packet */ int start_frame; /* (modify) start frame (ISO) */ int number_of_packets; /* (in) number of ISO packets */ int interval; /* (modify) transfer interval * (INT/ISO) */ int error_count; /* (return) number of ISO errors */ void *context; /* (in) context for completion */ usb_complete_t complete; /* (in) completion routine */ struct usb_iso_packet_descriptor iso_frame_desc[0]; /* (in) ISO ONLY */ }; /* ----------------------------------------------------------------------- */ /** * usb_fill_control_urb - initializes a control urb * @urb: pointer to the urb to initialize. * @dev: pointer to the struct usb_device for this urb. * @pipe: the endpoint pipe * @setup_packet: pointer to the setup_packet buffer * @transfer_buffer: pointer to the transfer buffer * @buffer_length: length of the transfer buffer * @complete_fn: pointer to the usb_complete_t function * @context: what to set the urb context to. * * Initializes a control urb with the proper information needed to submit * it to a device. */ static inline void usb_fill_control_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe, unsigned char *setup_packet, void *transfer_buffer, int buffer_length, usb_complete_t complete_fn, void *context) { urb->dev = dev; urb->pipe = pipe; urb->setup_packet = setup_packet; urb->transfer_buffer = transfer_buffer; urb->transfer_buffer_length = buffer_length; urb->complete = complete_fn; urb->context = context; } /** * usb_fill_bulk_urb - macro to help initialize a bulk urb * @urb: pointer to the urb to initialize. * @dev: pointer to the struct usb_device for this urb. * @pipe: the endpoint pipe * @transfer_buffer: pointer to the transfer buffer * @buffer_length: length of the transfer buffer * @complete_fn: pointer to the usb_complete_t function * @context: what to set the urb context to. * * Initializes a bulk urb with the proper information needed to submit it * to a device. */ static inline void usb_fill_bulk_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe, void *transfer_buffer, int buffer_length, usb_complete_t complete_fn, void *context) { urb->dev = dev; urb->pipe = pipe; urb->transfer_buffer = transfer_buffer; urb->transfer_buffer_length = buffer_length; urb->complete = complete_fn; urb->context = context; } /** * usb_fill_int_urb - macro to help initialize a interrupt urb * @urb: pointer to the urb to initialize. * @dev: pointer to the struct usb_device for this urb. * @pipe: the endpoint pipe * @transfer_buffer: pointer to the transfer buffer * @buffer_length: length of the transfer buffer * @complete_fn: pointer to the usb_complete_t function * @context: what to set the urb context to. * @interval: what to set the urb interval to, encoded like * the endpoint descriptor's bInterval value. * * Initializes a interrupt urb with the proper information needed to submit * it to a device. * * Note that High Speed and SuperSpeed interrupt endpoints use a logarithmic * encoding of the endpoint interval, and express polling intervals in * microframes (eight per millisecond) rather than in frames (one per * millisecond). * * Wireless USB also uses the logarithmic encoding, but specifies it in units of * 128us instead of 125us. For Wireless USB devices, the interval is passed * through to the host controller, rather than being translated into microframe * units. */ static inline void usb_fill_int_urb(struct urb *urb, struct usb_device *dev, unsigned int pipe, void *transfer_buffer, int buffer_length, usb_complete_t complete_fn, void *context, int interval) { urb->dev = dev; urb->pipe = pipe; urb->transfer_buffer = transfer_buffer; urb->transfer_buffer_length = buffer_length; urb->complete = complete_fn; urb->context = context; if (dev->speed == USB_SPEED_HIGH || dev->speed == USB_SPEED_SUPER) { /* make sure interval is within allowed range */ interval = clamp(interval, 1, 16); urb->interval = 1 << (interval - 1); } else { urb->interval = interval; } urb->start_frame = -1; } extern void usb_init_urb(struct urb *urb); extern struct urb *usb_alloc_urb(int iso_packets, gfp_t mem_flags); extern void usb_free_urb(struct urb *urb); #define usb_put_urb usb_free_urb extern struct urb *usb_get_urb(struct urb *urb); extern int usb_submit_urb(struct urb *urb, gfp_t mem_flags); extern int usb_unlink_urb(struct urb *urb); extern void usb_kill_urb(struct urb *urb); extern void usb_poison_urb(struct urb *urb); extern void usb_unpoison_urb(struct urb *urb); extern void usb_block_urb(struct urb *urb); extern void usb_kill_anchored_urbs(struct usb_anchor *anchor); extern void usb_poison_anchored_urbs(struct usb_anchor *anchor); extern void usb_unpoison_anchored_urbs(struct usb_anchor *anchor); extern void usb_unlink_anchored_urbs(struct usb_anchor *anchor); extern void usb_anchor_suspend_wakeups(struct usb_anchor *anchor); extern void usb_anchor_resume_wakeups(struct usb_anchor *anchor); extern void usb_anchor_urb(struct urb *urb, struct usb_anchor *anchor); extern void usb_unanchor_urb(struct urb *urb); extern int usb_wait_anchor_empty_timeout(struct usb_anchor *anchor, unsigned int timeout); extern struct urb *usb_get_from_anchor(struct usb_anchor *anchor); extern void usb_scuttle_anchored_urbs(struct usb_anchor *anchor); extern int usb_anchor_empty(struct usb_anchor *anchor); #define usb_unblock_urb usb_unpoison_urb /** * usb_urb_dir_in - check if an URB describes an IN transfer * @urb: URB to be checked * * Return: 1 if @urb describes an IN transfer (device-to-host), * otherwise 0. */ static inline int usb_urb_dir_in(struct urb *urb) { return (urb->transfer_flags & URB_DIR_MASK) == URB_DIR_IN; } /** * usb_urb_dir_out - check if an URB describes an OUT transfer * @urb: URB to be checked * * Return: 1 if @urb describes an OUT transfer (host-to-device), * otherwise 0. */ static inline int usb_urb_dir_out(struct urb *urb) { return (urb->transfer_flags & URB_DIR_MASK) == URB_DIR_OUT; } void *usb_alloc_coherent(struct usb_device *dev, size_t size, gfp_t mem_flags, dma_addr_t *dma); void usb_free_coherent(struct usb_device *dev, size_t size, void *addr, dma_addr_t dma); #if 0 struct urb *usb_buffer_map(struct urb *urb); void usb_buffer_dmasync(struct urb *urb); void usb_buffer_unmap(struct urb *urb); #endif struct scatterlist; int usb_buffer_map_sg(const struct usb_device *dev, int is_in, struct scatterlist *sg, int nents); #if 0 void usb_buffer_dmasync_sg(const struct usb_device *dev, int is_in, struct scatterlist *sg, int n_hw_ents); #endif void usb_buffer_unmap_sg(const struct usb_device *dev, int is_in, struct scatterlist *sg, int n_hw_ents); /*-------------------------------------------------------------------* * SYNCHRONOUS CALL SUPPORT * *-------------------------------------------------------------------*/ extern int usb_control_msg(struct usb_device *dev, unsigned int pipe, __u8 request, __u8 requesttype, __u16 value, __u16 index, void *data, __u16 size, int timeout); extern int usb_interrupt_msg(struct usb_device *usb_dev, unsigned int pipe, void *data, int len, int *actual_length, int timeout); extern int usb_bulk_msg(struct usb_device *usb_dev, unsigned int pipe, void *data, int len, int *actual_length, int timeout); /* wrappers around usb_control_msg() for the most common standard requests */ extern int usb_get_descriptor(struct usb_device *dev, unsigned char desctype, unsigned char descindex, void *buf, int size); extern int usb_get_status(struct usb_device *dev, int type, int target, void *data); extern int usb_string(struct usb_device *dev, int index, char *buf, size_t size); /* wrappers that also update important state inside usbcore */ extern int usb_clear_halt(struct usb_device *dev, int pipe); extern int usb_reset_configuration(struct usb_device *dev); extern int usb_set_interface(struct usb_device *dev, int ifnum, int alternate); extern void usb_reset_endpoint(struct usb_device *dev, unsigned int epaddr); /* this request isn't really synchronous, but it belongs with the others */ extern int usb_driver_set_configuration(struct usb_device *udev, int config); /* choose and set configuration for device */ extern int usb_choose_configuration(struct usb_device *udev); extern int usb_set_configuration(struct usb_device *dev, int configuration); /* * timeouts, in milliseconds, used for sending/receiving control messages * they typically complete within a few frames (msec) after they're issued * USB identifies 5 second timeouts, maybe more in a few cases, and a few * slow devices (like some MGE Ellipse UPSes) actually push that limit. */ #define USB_CTRL_GET_TIMEOUT 5000 #define USB_CTRL_SET_TIMEOUT 5000 /** * struct usb_sg_request - support for scatter/gather I/O * @status: zero indicates success, else negative errno * @bytes: counts bytes transferred. * * These requests are initialized using usb_sg_init(), and then are used * as request handles passed to usb_sg_wait() or usb_sg_cancel(). Most * members of the request object aren't for driver access. * * The status and bytecount values are valid only after usb_sg_wait() * returns. If the status is zero, then the bytecount matches the total * from the request. * * After an error completion, drivers may need to clear a halt condition * on the endpoint. */ struct usb_sg_request { int status; size_t bytes; /* private: * members below are private to usbcore, * and are not provided for driver access! */ spinlock_t lock; struct usb_device *dev; int pipe; int entries; struct urb **urbs; int count; struct completion complete; }; int usb_sg_init( struct usb_sg_request *io, struct usb_device *dev, unsigned pipe, unsigned period, struct scatterlist *sg, int nents, size_t length, gfp_t mem_flags ); void usb_sg_cancel(struct usb_sg_request *io); void usb_sg_wait(struct usb_sg_request *io); /* ----------------------------------------------------------------------- */ /* * For various legacy reasons, Linux has a small cookie that's paired with * a struct usb_device to identify an endpoint queue. Queue characteristics * are defined by the endpoint's descriptor. This cookie is called a "pipe", * an unsigned int encoded as: * * - direction: bit 7 (0 = Host-to-Device [Out], * 1 = Device-to-Host [In] ... * like endpoint bEndpointAddress) * - device address: bits 8-14 ... bit positions known to uhci-hcd * - endpoint: bits 15-18 ... bit positions known to uhci-hcd * - pipe type: bits 30-31 (00 = isochronous, 01 = interrupt, * 10 = control, 11 = bulk) * * Given the device address and endpoint descriptor, pipes are redundant. */ /* NOTE: these are not the standard USB_ENDPOINT_XFER_* values!! */ /* (yet ... they're the values used by usbfs) */ #define PIPE_ISOCHRONOUS 0 #define PIPE_INTERRUPT 1 #define PIPE_CONTROL 2 #define PIPE_BULK 3 #define usb_pipein(pipe) ((pipe) & USB_DIR_IN) #define usb_pipeout(pipe) (!usb_pipein(pipe)) #define usb_pipedevice(pipe) (((pipe) >> 8) & 0x7f) #define usb_pipeendpoint(pipe) (((pipe) >> 15) & 0xf) #define usb_pipetype(pipe) (((pipe) >> 30) & 3) #define usb_pipeisoc(pipe) (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS) #define usb_pipeint(pipe) (usb_pipetype((pipe)) == PIPE_INTERRUPT) #define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL) #define usb_pipebulk(pipe) (usb_pipetype((pipe)) == PIPE_BULK) static inline unsigned int __create_pipe(struct usb_device *dev, unsigned int endpoint) { return (dev->devnum << 8) | (endpoint << 15); } /* Create various pipes... */ #define usb_sndctrlpipe(dev, endpoint) \ ((PIPE_CONTROL << 30) | __create_pipe(dev, endpoint)) #define usb_rcvctrlpipe(dev, endpoint) \ ((PIPE_CONTROL << 30) | __create_pipe(dev, endpoint) | USB_DIR_IN) #define usb_sndisocpipe(dev, endpoint) \ ((PIPE_ISOCHRONOUS << 30) | __create_pipe(dev, endpoint)) #define usb_rcvisocpipe(dev, endpoint) \ ((PIPE_ISOCHRONOUS << 30) | __create_pipe(dev, endpoint) | USB_DIR_IN) #define usb_sndbulkpipe(dev, endpoint) \ ((PIPE_BULK << 30) | __create_pipe(dev, endpoint)) #define usb_rcvbulkpipe(dev, endpoint) \ ((PIPE_BULK << 30) | __create_pipe(dev, endpoint) | USB_DIR_IN) #define usb_sndintpipe(dev, endpoint) \ ((PIPE_INTERRUPT << 30) | __create_pipe(dev, endpoint)) #define usb_rcvintpipe(dev, endpoint) \ ((PIPE_INTERRUPT << 30) | __create_pipe(dev, endpoint) | USB_DIR_IN) static inline struct usb_host_endpoint * usb_pipe_endpoint(struct usb_device *dev, unsigned int pipe) { struct usb_host_endpoint **eps; eps = usb_pipein(pipe) ? dev->ep_in : dev->ep_out; return eps[usb_pipeendpoint(pipe)]; } /*-------------------------------------------------------------------------*/ static inline __u16 usb_maxpacket(struct usb_device *udev, int pipe, int is_out) { struct usb_host_endpoint *ep; unsigned epnum = usb_pipeendpoint(pipe); if (is_out) { WARN_ON(usb_pipein(pipe)); ep = udev->ep_out[epnum]; } else { WARN_ON(usb_pipeout(pipe)); ep = udev->ep_in[epnum]; } if (!ep) return 0; /* NOTE: only 0x07ff bits are for packet size... */ return usb_endpoint_maxp(&ep->desc); } /* ----------------------------------------------------------------------- */ /* translate USB error codes to codes user space understands */ static inline int usb_translate_errors(int error_code) { switch (error_code) { case 0: case -ENOMEM: case -ENODEV: case -EOPNOTSUPP: return error_code; default: return -EIO; } } /* Events from the usb core */ #define USB_DEVICE_ADD 0x0001 #define USB_DEVICE_REMOVE 0x0002 #define USB_BUS_ADD 0x0003 #define USB_BUS_REMOVE 0x0004 extern void usb_register_notify(struct notifier_block *nb); extern void usb_unregister_notify(struct notifier_block *nb); /* debugfs stuff */ extern struct dentry *usb_debug_root; /* LED triggers */ enum usb_led_event { USB_LED_EVENT_HOST = 0, USB_LED_EVENT_GADGET = 1, }; #ifdef CONFIG_USB_LED_TRIG extern void usb_led_activity(enum usb_led_event ev); #else static inline void usb_led_activity(enum usb_led_event ev) {} #endif #endif /* __KERNEL__ */ #endif