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WANG Cong ffa423fb32 tap: convert a mutex to a spinlock 
We are not allowed to block on the RCU reader side, so can't
just hold the mutex as before. As a quick fix, convert it to
a spinlock.

Fixes: d9f1f61c08 ("tap: Extending tap device create/destroy APIs")
Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Sainath Grandhi <sainath.grandhi@intel.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2017-07-11 13:41:57 -07:00
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accessibility
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acpi libnvdimm for 4.13 2017-07-07 09:44:06 -07:00
amba
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android
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ata Merge branch 'for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2017-07-06 09:41:58 -07:00
atm net: convert sock.sk_wmem_alloc from atomic_t to refcount_t 2017-07-01 07:39:08 -07:00
auxdisplay
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base Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2017-07-07 17:06:28 -07:00
bcma
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block libnvdimm for 4.13 2017-07-07 09:44:06 -07:00
bluetooth Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2017-07-05 12:31:59 -07:00
bus ARM: SoC driver updates 2017-07-04 14:47:47 -07:00
cdrom
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char Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2017-07-07 17:06:28 -07:00
clk ARM: Device-tree updates 2017-07-04 14:37:25 -07:00
clocksource ARM: SoC driver updates 2017-07-04 14:47:47 -07:00
connector
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cpufreq ARM: SoC driver updates 2017-07-04 14:47:47 -07:00
cpuidle powerpc updates for 4.13 2017-07-07 13:55:45 -07:00
crypto This is the first pull request for the new dma-mapping subsystem 2017-07-06 19:20:54 -07:00
dax Writeback error handling fixes (pile #2) 2017-07-07 19:38:17 -07:00
dca
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devfreq
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dio
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dma dmaengine updates for 4.13-rc1 2017-07-08 12:36:50 -07:00
dma-buf
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edac
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eisa
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extcon
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firewire
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firmware This is the first pull request for the new dma-mapping subsystem 2017-07-06 19:20:54 -07:00
fmc
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fpga
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fsi
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gpio Merge (most of) tag 'mfd-next-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd 2017-07-07 13:30:05 -07:00
gpu pci-v4.13-changes 2017-07-08 15:51:57 -07:00
hid driver core patches for 4.13-rc1 2017-07-03 20:27:48 -07:00
hsi HSI changes for the v4.13 series 2017-07-04 14:28:22 -07:00
hv SCSI misc on 20170704 2017-07-06 12:10:33 -07:00
hwmon
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hwspinlock
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hwtracing Char/Misc patches for 4.13-rc1 2017-07-03 20:55:59 -07:00
i2c Char/Misc patches for 4.13-rc1 2017-07-03 20:55:59 -07:00
ide
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idle intel_idle: Use more common logging style 2017-06-29 22:58:35 +02:00
iio hwmon updates for v4.13: 2017-07-04 11:48:27 -07:00
infiniband Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2017-07-07 17:06:28 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2017-07-08 12:39:37 -07:00
iommu This is the first pull request for the new dma-mapping subsystem 2017-07-06 19:20:54 -07:00
ipack
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irqchip arm64 updates for 4.13: 2017-07-05 17:09:27 -07:00
isdn Merge branch 'work.misc-set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-07-05 13:13:32 -07:00
leds LED updates for 4.13 2017-07-06 11:32:40 -07:00
lguest
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lightnvm lightnvm: pblk: set line bitmap check under debug 2017-06-30 11:08:18 -06:00
macintosh Merge branch 'work.misc-set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-07-05 13:13:32 -07:00
mailbox Merge branch 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration 2017-07-07 10:24:07 -07:00
mcb
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md Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md 2017-07-08 12:50:18 -07:00
media media updates for v4.13-rc1 2017-07-06 11:15:19 -07:00
memory ARM: SoC driver updates 2017-07-04 14:47:47 -07:00
memstick
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message
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mfd Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2017-07-08 12:39:37 -07:00
misc powerpc updates for 4.13 2017-07-07 13:55:45 -07:00
mmc This is the big bulk of pin control changes for the v4.13 series: 2017-07-06 11:38:59 -07:00
mtd This is the big bulk of pin control changes for the v4.13 series: 2017-07-06 11:38:59 -07:00
mux
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net tap: convert a mutex to a spinlock 2017-07-11 13:41:57 -07:00
nfc NFC 4.13 pull request 2017-07-01 14:30:39 -07:00
ntb
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nubus
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nvdimm libnvdimm for 4.13 2017-07-07 09:44:06 -07:00
nvme pci-v4.13-changes 2017-07-08 15:51:57 -07:00
nvmem
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of pci-v4.13-changes 2017-07-08 15:51:57 -07:00
oprofile
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parisc parisc: ->mapping_error 2017-07-05 21:46:42 +02:00
parport
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pci pci-v4.13-changes 2017-07-08 15:51:57 -07:00
pcmcia
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perf
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phy
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pinctrl This is the big bulk of pin control changes for the v4.13 series: 2017-07-06 11:38:59 -07:00
platform Merge (most of) tag 'mfd-next-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd 2017-07-07 13:30:05 -07:00
pnp This is the bulk of GPIO changes for the v4.13 series: 2017-07-07 12:40:27 -07:00
power power supply and reset changes for the v4.13 series 2017-07-04 14:25:14 -07:00
powercap
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pps
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ps3
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ptp ptp: dte: Use LL suffix for 64-bit constants 2017-07-06 11:40:58 +01:00
pwm
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rapidio
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ras arm64 updates for 4.13: 2017-07-05 17:09:27 -07:00
regulator Merge remote-tracking branches 'regulator/topic/settle', 'regulator/topic/tps65910' and 'regulator/topic/tps65917' into regulator-next 2017-07-03 16:52:21 +01:00
remoteproc
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reset ARM: SoC driver updates 2017-07-04 14:47:47 -07:00
rpmsg rpmsg updates for v4.13 2017-07-06 15:38:31 -07:00
rtc
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s390 libnvdimm for 4.13 2017-07-07 09:44:06 -07:00
sbus
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scsi SCSI misc on 20170704 2017-07-06 12:10:33 -07:00
sfi
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sh drivers/sh/intc/virq.c: delete an error message for a failed memory allocation in add_virq_to_pirq() 2017-07-06 16:24:30 -07:00
sn
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soc ARM: SoC driver updates 2017-07-04 14:47:47 -07:00
spi Merge branch 'for-spi' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-07-08 10:41:53 -07:00
spmi
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ssb
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staging media updates for v4.13-rc1 2017-07-06 11:15:19 -07:00
target Merge branch 'work.read_write' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2017-07-05 14:35:57 -07:00
tc
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tee
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thermal Merge (most of) tag 'mfd-next-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd 2017-07-07 13:30:05 -07:00
thunderbolt
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tty This is the bulk of GPIO changes for the v4.13 series: 2017-07-07 12:40:27 -07:00
uio
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usb USB fixes for 4.13-rc1 2017-07-07 13:42:04 -07:00
uwb driver core patches for 4.13-rc1 2017-07-03 20:27:48 -07:00
vfio
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vhost Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2017-07-05 12:31:59 -07:00
video pci-v4.13-changes 2017-07-08 15:51:57 -07:00
virt
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virtio
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vlynq
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vme
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w1
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watchdog
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xen This is the first pull request for the new dma-mapping subsystem 2017-07-06 19:20:54 -07:00
zorro
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Kconfig
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Makefile
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