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Andi Kleen b1fca27d38 kernel debug: support resetting WARN*_ONCE 
I like _ONCE warnings because it's guaranteed that they don't flood the
log.

During testing I find it useful to reset the state of the once warnings,
so that I can rerun tests and see if they trigger again, or can
guarantee that a test run always hits the same warnings.

This patch adds a debugfs interface to reset all the _ONCE warnings so
that they appear again:

  echo 1 > /sys/kernel/debug/clear_warn_once

This is implemented by putting all the warning booleans into a special
section, and clearing it.

[akpm@linux-foundation.org: coding-style fixes]
Link: http://lkml.kernel.org/r/20171017221455.6740-1-andi@firstfloor.org
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Tested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-11-17 16:10:00 -08:00
..
ABI
Merge tag 'f2fs-for-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs
2017-11-16 12:10:21 -08:00
accounting
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acpi
ACPI / LPIT: Add Low Power Idle Table (LPIT) support
2017-10-11 15:38:10 +02:00
admin-guide
Merge tag 'powerpc-4.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
2017-11-16 12:47:46 -08:00
aoe
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arm
ARM: sunxi: add support for R40 SoC
2017-09-22 21:57:09 +02:00
arm64
Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
2017-11-15 10:56:56 -08:00
auxdisplay
…
backlight
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blackfin
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block
block: remove __bio_kmap_atomic
2017-11-10 19:53:25 -07:00
blockdev
Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
2017-09-07 21:11:05 -07:00
bpf
bpf: document answers to common questions about BPF
2017-11-01 21:01:47 +09:00
bus-devices
…
cdrom
documentation: Update ide-cd documentation to reflect CONFIG_BLK_DEV_HD_IDE removal
2017-10-12 11:25:31 -06:00
cgroup-v1
mm, vmpressure: pass-through notification support
2017-07-10 16:32:31 -07:00
cma
…
connector
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console
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core-api
Merge tag 'docs-4.15' of git://git.lwn.net/linux
2017-11-13 08:25:06 -08:00
cpu-freq
cpufreq: stats: Handle the case when trans_table goes beyond PAGE_SIZE
2017-11-08 23:41:25 +01:00
cpuidle
…
cris
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crypto
crypto: doc - adapt api sample to use async. op wait
2017-11-03 22:11:23 +08:00
dev-tools
kmemcheck: rip it out
2017-11-15 18:21:05 -08:00
device-mapper
dm raid: fix incorrect status output at the end of a "recover" process
2017-10-05 16:21:30 -04:00
devicetree
Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
2017-11-16 16:05:01 -08:00
doc-guide
Documentation: fix ref to sphinx/kerneldoc.py
2017-10-19 12:57:10 -06:00
driver-api
Merge tag 'pinctrl-v4.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
2017-11-16 10:57:11 -08:00
driver-model
driver core: remove DRIVER_ATTR
2017-09-19 09:20:33 +02:00
early-userspace
…
EDID
…
extcon
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fault-injection
cpu/hotplug: Get rid of CPU hotplug notifier leftovers
2017-11-13 10:03:53 +01:00
fb
documentation: fb: update list of available compiled-in fonts
2017-11-08 03:39:52 -07:00
features
Documentation/features/KASAN: mark KASAN as supported only on 64-bit on x86
2017-10-03 14:40:22 -06:00
filesystems
proc, coredump: add CoreDumping flag to /proc/pid/status
2017-11-17 16:10:00 -08:00
firmware_class
…
fmc
…
fpga
…
frv
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gpio
Merge branch 'gpio-irqchip-rework' of /home/linus/linux-gpio into devel
2017-11-09 09:38:42 +01:00
gpu
drm: some KMS todo ideas
2017-10-18 10:15:02 +02:00
hid
Documentation: fix input related doc refs
2017-10-12 11:14:06 -06:00
hwmon
pmbus: Add driver for Maxim MAX31785 Intelligent Fan Controller
2017-11-05 06:06:33 -08:00
i2c
i2c: i801: Add support for Intel Cedar Fork
2017-10-05 14:44:56 +02:00
ia64
…
ide
…
iio
iio: adc: New driver for Cirrus Logic EP93xx ADC
2017-07-25 19:56:23 +01:00
infiniband
Documentation: Hardware tag matching
2017-08-29 08:30:21 -04:00
input
Documentation: fix input related doc refs
2017-10-12 11:14:06 -06:00
ioctl
scsi: cxlflash: Introduce host ioctl support
2017-06-26 15:01:11 -04:00
isdn
…
kbuild
Merge tag 'devicetree-for-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
2017-11-14 18:25:40 -08:00
kdump
kexec/kdump: minor Documentation updates for arm64 and Image
2017-07-12 16:26:00 -07:00
kernel-hacking
Merge tag 'docs-4.13' of git://git.lwn.net/linux
2017-07-03 21:13:25 -07:00
laptops
Documentation: fix admin-guide doc refs
2017-10-12 11:13:28 -06:00
leds
Documentation: leds: Update 00-INDEX file
2017-10-23 20:17:03 +02:00
lightnvm
…
livepatch
livepatch: add (un)patch callbacks
2017-10-19 10:08:56 +02:00
locking
Documentation: fix locking rt-mutex doc refs
2017-10-19 12:56:44 -06:00
m68k
…
md
md-cluster: update document for raid10
2017-11-01 21:32:25 -07:00
media
Merge tag 'media/v4.15-1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
2017-11-15 20:30:12 -08:00
memory-devices
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metag
…
mic
…
mips
…
misc-devices
…
mmc
…
mn10300
…
mtd
…
namespaces
…
netlabel
…
networking
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2017-11-15 11:56:19 -08:00
nfc
…
nios2
…
nvdimm
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nvmem
NVMEM documentation fix: A minor typo
2017-08-24 13:31:58 -06:00
openrisc
Documentation: openrisc: Updates to README
2017-10-30 21:37:53 +09:00
parisc
…
PCI
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pcmcia
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perf
Documentation: perf: hisi: Documentation for HiSilicon SoC PMU driver
2017-10-19 17:06:34 +01:00
phy
…
platform
…
power
Merge tag 'pm-4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2017-11-13 19:43:50 -08:00
powerpc
Merge tag 'powerpc-4.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
2017-07-07 13:55:45 -07:00
pps
drivers/pps: aesthetic tweaks to PPS-related content
2017-09-08 18:26:51 -07:00
process
Merge tag 'docs-4.15' of git://git.lwn.net/linux
2017-11-13 08:25:06 -08:00
pti
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ptp
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rapidio
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RCU
Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-11-13 12:18:10 -08:00
s390
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scheduler
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scsi
scsi: smartpqi: correct spelling error in documentation
2017-10-23 04:15:17 -04:00
security
Documentation: fix security related doc refs
2017-10-12 11:14:40 -06:00
serial
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sh
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sound
Merge tag 'sound-4.15-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
2017-11-14 18:01:46 -08:00
sparc
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sphinx
Documentation/sphinx: fix kernel-doc decode for non-utf-8 locale
2017-08-31 13:36:28 -06:00
sphinx-static
docs RTD theme: code-block with line nos - lines and line numbers don't line up.
2017-07-17 13:48:45 -06:00
spi
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sysctl
mm, sysctl: make NUMA stats configurable
2017-11-15 18:21:07 -08:00
target
…
thermal
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timers
docs: highres: fix broken urls
2017-09-26 14:58:23 -06:00
trace
Merge tag 'char-misc-4.15-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
2017-11-16 09:10:59 -08:00
translations
Merge tag 'pinctrl-v4.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
2017-11-16 10:57:11 -08:00
usb
Documentation: fix usb related doc refs
2017-10-12 11:15:48 -06:00
userspace-api
seccomp: Implement SECCOMP_RET_KILL_PROCESS action
2017-08-14 13:46:50 -07:00
virtual
Merge tag 'kvm-s390-next-4.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux
2017-11-16 14:39:46 +01:00
vm
mm/mmu_notifier: avoid double notification when it is useless
2017-11-15 18:21:03 -08:00
w1
add w1_ds28e17 driver for the DS28E17 Onewire to I2C master bridge
2017-10-04 10:29:22 +02:00
watchdog
Documentation: fix selftests related file refs
2017-10-19 12:58:21 -06:00
wimax
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x86
Merge branch 'x86-cache-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-11-13 19:05:19 -08:00
xtensa
of: update ePAPR references to point to Devicetree Specification
2017-06-22 11:22:06 -05:00
.gitignore
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00-INDEX
Merge tag 'linux-kselftest-4.13-rc1-update' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
2017-07-07 14:04:47 -07:00
atomic_bitops.txt
Documentation/locking/atomic: Add documents for new atomic_t APIs
2017-08-10 12:29:00 +02:00
atomic_t.txt
Documentation/locking/atomic: Finish the document...
2017-08-25 11:06:33 +02:00
bcache.txt
bcache.txt: standardize document format
2017-07-14 13:51:27 -06:00
bt8xxgpio.txt
bt8xxgpio.txt: standardize document format
2017-07-14 13:51:27 -06:00
btmrvl.txt
btmrvl.txt: standardize document format
2017-07-14 13:51:27 -06:00
bus-virt-phys-mapping.txt
bus-virt-phys-mapping.txt: standardize document format
2017-07-14 13:51:28 -06:00
cachetlb.txt
cachetlb.txt: standardize document format
2017-07-14 13:51:28 -06:00
cgroup-v2.txt
cgroup, sched: Move basic cpu stats from cgroup.stat to cpu.stat
2017-10-26 10:56:33 -07:00
Changes
…
circular-buffers.txt
circular-buffers.txt: standardize document format
2017-07-14 13:51:29 -06:00
clearing-warn-once.txt
kernel debug: support resetting WARN*_ONCE
2017-11-17 16:10:00 -08:00
clk.txt
clk.txt: standardize document format
2017-07-14 13:51:29 -06:00
CodingStyle
…
conf.py
docs-rst: don't require adjustbox anymore
2017-09-08 10:02:55 -06:00
cpu-load.txt
cpu-load: standardize document format
2017-07-14 13:51:30 -06:00
cputopology.txt
cputopology.txt: standardize document format
2017-07-14 13:51:30 -06:00
crc32.txt
crc32.txt: standardize document format
2017-07-14 13:51:30 -06:00
dcdbas.txt
dcdbas.txt: standardize document format
2017-07-14 13:51:31 -06:00
debugging-modules.txt
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debugging-via-ohci1394.txt
debugging-via-ohci1394.txt: standardize document format
2017-07-14 13:51:34 -06:00
dell_rbu.txt
dell_rbu.txt: standardize document format
2017-07-14 13:58:12 -06:00
digsig.txt
digsig.txt: standardize document format
2017-07-14 13:51:31 -06:00
DMA-API-HOWTO.txt
DMA-API-HOWTO.txt: standardize document format
2017-07-14 13:51:32 -06:00
DMA-API.txt
dma-coherent: remove the DMA_MEMORY_MAP and DMA_MEMORY_IO flags
2017-09-01 11:59:17 +02:00
DMA-attributes.txt
DMA-attributes.txt: standardize document format
2017-07-14 13:51:33 -06:00
DMA-ISA-LPC.txt
DMA-ISA-LPC.txt: standardize document format
2017-07-14 13:51:33 -06:00
docutils.conf
…
dontdiff
Remove gperf usage from toolchain
2017-08-19 11:02:53 -07:00
efi-stub.txt
efi-stub.txt: standardize document format
2017-07-14 13:51:34 -06:00
eisa.txt
eisa.txt: standardize document format
2017-07-14 13:51:34 -06:00
errseq.rst
Documentation: add some docs for errseq_t
2017-07-29 09:01:02 -04:00
flexible-arrays.txt
flexible-arrays.txt: standardize document format
2017-07-14 13:51:35 -06:00
futex-requeue-pi.txt
futex-requeue-pi.txt: standardize document format
2017-07-14 13:51:35 -06:00
gcc-plugins.txt
gcc-plugins.txt: standardize document format
2017-07-14 13:51:36 -06:00
highuid.txt
highuid.txt: standardize document format
2017-07-14 13:51:36 -06:00
hw_random.txt
hw_random.txt: standardize document format
2017-07-14 13:51:37 -06:00
hwspinlock.txt
hwspinlock.txt: standardize document format
2017-07-14 13:51:37 -06:00
index.rst
Make the main documentation title less Geocities
2017-06-23 14:02:27 -06:00
intel_txt.txt
intel_txt.txt: standardize document format
2017-07-14 13:51:38 -06:00
Intel-IOMMU.txt
Intel-IOMMU.txt: standardize document format
2017-07-14 13:51:38 -06:00
io_ordering.txt
io_ordering.txt: standardize document format
2017-07-14 13:51:39 -06:00
io-mapping.txt
io-mapping.txt: standardize document format
2017-07-14 13:51:38 -06:00
iostats.txt
iostats.txt: update it to cover recent Kernels
2017-07-14 13:51:40 -06:00
IPMI.txt
ipmi: Make IPMI panic strings always available
2017-09-27 16:03:45 -05:00
IRQ-affinity.txt
IRQ-affinity.txt: standardize document format
2017-07-14 13:51:41 -06:00
IRQ-domain.txt
IRQ-domain.txt: standardize document format
2017-07-14 13:51:41 -06:00
IRQ.txt
IRQ.txt: add a markup for its title
2017-07-14 13:51:42 -06:00
irqflags-tracing.txt
irqflags-tracing.txt: standardize document format
2017-07-14 13:51:42 -06:00
isa.txt
isa.txt: standardize document format
2017-07-14 13:51:43 -06:00
isapnp.txt
isapnp.txt: promote title level
2017-07-14 13:51:43 -06:00
kernel-doc-nano-HOWTO.txt
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kernel-per-CPU-kthreads.txt
kernel-per-CPU-kthreads.txt: standardize document format
2017-07-14 13:51:43 -06:00
kobject.txt
kobject.txt: standardize document format
2017-07-14 13:51:44 -06:00
kprobes.txt
kprobes/docs: Remove jprobes related documents
2017-10-20 11:02:55 +02:00
kref.txt
kref.txt: standardize document format
2017-07-14 13:51:45 -06:00
ldm.txt
ldm.txt: standardize document format
2017-07-14 13:51:45 -06:00
lockup-watchdogs.txt
lockup-watchdogs.txt: standardize document format
2017-07-14 13:51:46 -06:00
logo.gif
…
logo.txt
…
lsm.txt
…
lzo.txt
lzo.txt: standardize document format
2017-07-14 13:51:46 -06:00
mailbox.txt
mailbox.txt: standardize document format
2017-07-14 13:51:47 -06:00
Makefile
Documentation: add script and build target to check for broken file references
2017-10-12 11:07:42 -06:00
memory-barriers.txt
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-11-13 12:38:26 -08:00
memory-hotplug.txt
memory-hotplug.txt: standardize document format
2017-07-14 13:57:53 -06:00
men-chameleon-bus.txt
men-chameleon-bus.txt: standardize document format
2017-07-14 13:57:54 -06:00
nommu-mmap.txt
nommu-mmap.txt: don't use all upper case on titles
2017-07-14 13:57:55 -06:00
ntb.txt
Merge tag 'standardize-docs' of git://git.lwn.net/linux
2017-07-15 12:58:58 -07:00
numastat.txt
numastat.txt: standardize document format
2017-07-14 13:57:56 -06:00
padata.txt
padata.txt: standardize document format
2017-07-14 13:57:56 -06:00
parport-lowlevel.txt
parport-lowlevel.txt: standardize document format
2017-07-14 13:57:57 -06:00
percpu-rw-semaphore.txt
percpu-rw-semaphore.txt: standardize document format
2017-07-14 13:57:58 -06:00
phy.txt
phy.txt: standardize document format
2017-07-14 13:57:58 -06:00
pi-futex.txt
Documentation: fix locking rt-mutex doc refs
2017-10-19 12:56:44 -06:00
pnp.txt
pnp.txt: standardize document format
2017-07-14 13:57:59 -06:00
preempt-locking.txt
preempt-locking.txt: standardize document format
2017-07-14 13:58:00 -06:00
printk-formats.txt
printk-formats.txt: Add examples for %pF and %pS usage
2017-08-24 18:49:52 +02:00
pwm.txt
pwm: Standardize document format
2017-07-06 08:23:30 +02:00
rbtree.txt
rbtree: cache leftmost node internally
2017-09-08 18:26:48 -07:00
remoteproc.txt
remoteproc.txt: standardize document format
2017-07-14 13:58:02 -06:00
rfkill.txt
rfkill.txt: standardize document format
2017-07-14 13:58:02 -06:00
robust-futex-ABI.txt
robust-futex-ABI.txt: standardize document format
2017-07-14 13:58:03 -06:00
robust-futexes.txt
robust-futexes.txt: standardize document format
2017-07-14 13:58:03 -06:00
rpmsg.txt
rpmsg.txt: standardize document format
2017-07-14 13:58:04 -06:00
rtc.txt
rtc: add generic nvmem support
2017-07-07 13:14:14 +02:00
SAK.txt
SAK.txt: standardize document format
2017-07-14 13:58:04 -06:00
sgi-ioc4.txt
sgi-ioc4.txt: standardize document format
2017-07-14 13:58:05 -06:00
siphash.txt
siphash.txt: standardize document format
2017-07-14 13:58:06 -06:00
SM501.txt
SM501.txt: standardize document format
2017-07-14 13:58:06 -06:00
smsc_ece1099.txt
smsc_ece1099.txt: standardize document format
2017-07-14 13:58:07 -06:00
static-keys.txt
jump_label: Provide hotplug context variants
2017-08-10 12:28:59 +02:00
SubmittingPatches
…
svga.txt
svga.txt: standardize document format
2017-07-14 13:58:08 -06:00
switchtec.txt
…
sync_file.txt
…
tee.txt
tee.txt: standardize document format
2017-07-14 13:58:14 -06:00
this_cpu_ops.txt
this_cpu_ops.txt: standardize document format
2017-07-14 13:58:08 -06:00
unaligned-memory-access.txt
unaligned-memory-access.txt: standardize document format
2017-07-14 13:58:09 -06:00
vfio-mediated-device.txt
vfio-mediated-device.txt: standardize document format
2017-07-14 13:58:10 -06:00
vfio.txt
vfio.txt: standardize document format
2017-07-14 13:58:10 -06:00
video-output.txt
…
xillybus.txt
xillybus.txt: standardize document format
2017-07-14 13:58:11 -06:00
xz.txt
xz.txt: standardize document format
2017-07-14 13:58:11 -06:00
zorro.txt
zorro.txt: standardize document format
2017-07-14 13:58:12 -06:00