AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity
4d1c6a0ec2
kernel_optimize_test/drivers
History
Rasmus Villemoes 4d1c6a0ec2 watchdog: introduce watchdog.open_timeout commandline parameter 
The watchdog framework takes care of feeding a hardware watchdog until
userspace opens /dev/watchdogN. If that never happens for some reason
(buggy init script, corrupt root filesystem or whatnot) but the kernel
itself is fine, the machine stays up indefinitely. This patch allows
setting an upper limit for how long the kernel will take care of the
watchdog, thus ensuring that the watchdog will eventually reset the
machine.

A value of 0 (the default) means infinite timeout, preserving the
current behaviour.

This is particularly useful for embedded devices where some fallback
logic is implemented in the bootloader (e.g., use a different root
partition, boot from network, ...).

There is already handle_boot_enabled serving a similar purpose. However,
such a binary choice is unsuitable if the hardware watchdog cannot be
programmed by the bootloader to provide a timeout long enough for
userspace to get up and running. Many of the embedded devices we see use
external (gpio-triggered) watchdogs with a fixed timeout of the order of
1-2 seconds.

The open timeout only applies for the first open from
userspace. Should userspace need to close the watchdog device, with
the intention of re-opening it shortly, the application can emulate
the open timeout feature by combining the nowayout feature with an
appropriate WDIOC_SETTIMEOUT immediately prior to closing the device.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
2019-07-08 20:04:13 +02:00
..
accessibility
acpi treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
amba treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
android binder: fix possible UAF when freeing buffer 2019-06-13 10:35:55 +02:00
ata treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
atm
auxdisplay auxdisplay/ht16k33.c: Convert to use vm_map_pages_zero() 2019-06-20 15:06:24 +02:00
base drivers/base/devres: introduce devm_release_action() 2019-06-13 17:34:56 -10:00
bcma
block treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
bluetooth treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
bus SPDX update for 5.2-rc6 2019-06-21 09:58:42 -07:00
cdrom
char treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 505 2019-06-19 17:11:22 +02:00
clk A handful of clk driver fixes and one core framework fix 2019-06-28 08:50:09 +08:00
clocksource treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
connector
counter Second set of IIO fixes for the 5.2 cycle. 2019-06-17 22:28:29 +02:00
cpufreq treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cpuidle treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
crypto treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
dax mm/devm_memremap_pages: fix final page put race 2019-06-13 17:34:56 -10:00
dca
devfreq treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
dio
dma dmaengine fixes for v5.2 2019-07-06 10:06:37 -07:00
dma-buf treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
edac treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
eisa treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 210 2019-05-30 11:29:53 -07:00
extcon treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
firewire
firmware Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-06-29 19:32:09 +08:00
fmc
fpga SPDX update for 5.2-rc4 2019-06-08 12:52:42 -07:00
fsi treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 469 2019-06-19 17:09:11 +02:00
gnss
gpio gpio/spi: Fix spi-gpio regression on active high CS 2019-07-02 22:31:37 +02:00
gpu drm/imx: fix stale vblank timestamp after a modeset 2019-07-05 14:51:03 +10:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid 2019-06-28 08:39:18 +08:00
hsi treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 336 2019-06-05 17:37:07 +02:00
hv treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 320 2019-06-05 17:37:05 +02:00
hwmon treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
hwspinlock
hwtracing
i2c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
i3c
ide treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
idle treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 335 2019-06-05 17:37:06 +02:00
iio Staging/IIO/Counter fixes for 5.2-rc6 2019-06-21 10:20:19 -07:00
infiniband RDMA/efa: Handle mmap insertions overflow 2019-06-18 16:27:24 -04:00
input SPDX update for 5.2-rc6 2019-06-21 09:58:42 -07:00
interconnect
iommu IOMMU Fix for v5.2-rc5: 2019-06-22 14:08:47 -07:00
ipack treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
irqchip Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-06-29 19:36:53 +08:00
isdn SPDX update for 5.2-rc3, round 1 2019-05-31 08:34:32 -07:00
leds treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
lightnvm treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 410 2019-06-05 17:37:14 +02:00
macintosh treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 247 2019-06-19 17:09:08 +02:00
mailbox treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mcb treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
md - Fix incorrect uses of kstrndup and DM logging macros in DM's early 2019-06-28 08:48:21 +08:00
media treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
memory treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
memstick treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
message
mfd - Bug Fixes 2019-06-25 03:41:03 +08:00
misc Char/Misc driver fixes for 5.2-rc6 2019-06-21 10:18:16 -07:00
mmc SPDX update for 5.2-rc6 2019-06-21 09:58:42 -07:00
mtd mtd: rawnand: sunxi: Add A23/A33 DMA support with extra MBUS configuration 2019-07-05 22:30:58 +02:00
mux
net ipv6: constify rt6_nexthop() 2019-06-26 13:26:08 -07:00
nfc treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 417 2019-06-05 17:37:15 +02:00
ntb treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288 2019-06-05 17:36:37 +02:00
nubus
nvdimm mm/devm_memremap_pages: fix final page put race 2019-06-13 17:34:56 -10:00
nvme Merge branch 'nvme-5.2-rc-next' of git://git.infradead.org/nvme into for-linus 2019-06-07 14:04:28 -06:00
nvmem treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
of treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428 2019-06-05 17:37:16 +02:00
opp treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
oprofile
parisc SPDX update for 5.2-rc4 2019-06-08 12:52:42 -07:00
parport treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
pci PCI: PM: Avoid skipping bus-level PM on platforms without ACPI 2019-06-26 23:51:56 +02:00
pcmcia treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
perf treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
phy treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
pinctrl Pin control fixes for the v5.2 cycle: 2019-06-29 16:51:10 +08:00
platform treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
pnp
power treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
powercap treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 309 2019-06-05 17:37:04 +02:00
pps
ps3
ptp
pwm treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
rapidio
ras RAS/CEC: Convert the timer callback to a workqueue 2019-06-07 23:21:39 +02:00
regulator treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
remoteproc treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
reset treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
rpmsg
rtc treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
s390 vfio-ccw: Destroy kmem cache region on module exit 2019-06-13 15:52:28 +02:00
sbus
scsi SCSI fixes on 20190628 2019-06-29 16:59:45 +08:00
sfi
sh
siox
slimbus
sn
soc This set of patches fixes regressions introduced in v5.2 kernel when DA8xx 2019-07-02 15:13:20 -07:00
soundwire soundwire fixes for v5.2-rc4 2019-06-10 18:07:39 +02:00
spi treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
spmi treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
ssb
staging Merge branch 'erofs_fix' into staging-linus 2019-06-17 22:59:28 +02:00
target SCSI fixes on 20190705 2019-07-06 09:56:20 -07:00
tc
tee treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
thermal treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
thunderbolt thunderbolt: Implement CIO reset correctly for Titan Ridge 2019-06-14 14:25:43 +03:00
tty
uio treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
usb usb: fixes for v5.2-rc5 2019-06-20 11:56:35 +02:00
uwb treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
vfio treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
vhost treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 482 2019-06-19 17:09:52 +02:00
video treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
virt
virtio
visorbus
vlynq
vme
w1 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
watchdog watchdog: introduce watchdog.open_timeout commandline parameter 2019-07-08 20:04:13 +02:00
xen treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
zorro
Kconfig
Makefile