Christophe Leroy 38a1222ae4 watchdog: core: make sure the watchdog worker always works ...

When running a command like 'chrt -f 50 dd if=/dev/zero of=/dev/null',
the watchdog_worker fails to service the HW watchdog and the
HW watchdog fires long before the watchdog soft timeout.

At the moment, the watchdog_worker is invoked as a delayed work.
Delayed works are handled by non realtime kernel threads. The
WQ_HIGHPRI flag only increases the niceness of that threads.

This patch replaces the delayed work logic by kthread delayed work,
and sets the associated kernel task to SCHED_FIFO with the highest
priority, in order to ensure that the watchdog worker will run as
soon as possible.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

2017-12-28 20:45:57 +01:00

..

acquirewdt.c

watchdog: drop owner assignment from platform_drivers

2014-10-20 16:21:56 +02:00

advantechwdt.c

watchdog: advantechwdt: mark expected switch fall-through

2017-12-28 20:45:28 +01:00

alim1535_wdt.c

watchdog: alim1535_wdt: mark expected switch fall-through

2017-12-28 20:45:28 +01:00

alim7101_wdt.c

treewide: Switch DEFINE_TIMER callbacks to struct timer_list *

2017-11-21 15:57:05 -08:00

ar7_wdt.c

watchdog: drop owner assignment from platform_drivers

2014-10-20 16:21:56 +02:00

asm9260_wdt.c

watchdog: asm9260_wdt: don't round closest with get_timeleft

2017-09-09 20:25:34 +02:00

aspeed_wdt.c

watchdog: aspeed: Move init to arch_initcall

2017-12-28 20:44:50 +01:00

at32ap700x_wdt.c

watchdog: drop owner assignment from platform_drivers

2014-10-20 16:21:56 +02:00

at91rm9200_wdt.c

Merge git://www.linux-watchdog.org/linux-watchdog

2015-09-11 15:12:59 -07:00

at91sam9_wdt.c

treewide: setup_timer() -> timer_setup()

2017-11-21 15:57:07 -08:00

at91sam9_wdt.h

watchdog: add a driver to support SAMA5D4 watchdog timer

2015-09-09 21:38:29 +02:00

ath79_wdt.c

mips: separate extable.h, switch module.h to it

2016-10-05 18:36:18 -04:00

atlas7_wdt.c

watchdog: constify watchdog_ops structures

2017-02-24 14:00:23 -08:00

bcm47xx_wdt.c

treewide: setup_timer() -> timer_setup()

2017-11-21 15:57:07 -08:00

bcm63xx_wdt.c

treewide: setup_timer() -> timer_setup()

2017-11-21 15:57:07 -08:00

bcm2835_wdt.c

scripts/spelling.txt: add "partiton" pattern and fix typo instances

2017-02-27 18:43:46 -08:00

bcm7038_wdt.c

watchdog: bcm7038: Check the return value from clk_prepare_enable()

2017-09-09 20:52:13 +02:00

bcm_kona_wdt.c

watchdog: bcm281xx: Fix use of uninitialized spinlock.

2017-05-19 10:42:25 +02:00

bfin_wdt.c

watchdog: drop owner assignment from platform_drivers

2014-10-20 16:21:56 +02:00

booke_wdt.c

watchdog: constify watchdog_ops structures

2017-02-24 14:00:23 -08:00

cadence_wdt.c

watchdog: cadence_wdt: Show information when driver is probed

2017-09-09 20:35:31 +02:00

coh901327_wdt.c

watchdog: coh901327_wdt: constify watchdog_ops structure

2017-09-09 20:06:38 +02:00

cpu5wdt.c

treewide: setup_timer() -> timer_setup()

2017-11-21 15:57:07 -08:00

cpwd.c

watchdog: cpwd: Convert timers to use timer_setup()

2017-11-02 15:50:26 -07:00

da9052_wdt.c

watchdog: da9052_wdt: Convert to use device managed functions

2017-02-24 14:00:23 -08:00

da9055_wdt.c

watchdog: da9055_wdt: Convert to use device managed functions

2017-02-24 14:00:23 -08:00

da9062_wdt.c

watchdog: da9062: use protection delay mechanism from core

2017-12-28 20:45:08 +01:00

da9063_wdt.c

watchdog: da9063_wdt: Simplify by removing unneeded struct...

2017-09-09 20:55:26 +02:00

davinci_wdt.c

watchdog: davinci_wdt: add restart function

2017-12-28 20:45:56 +01:00

diag288_wdt.c

watchdog: constify watchdog_ops and watchdog_info structures

2017-09-09 20:29:53 +02:00

digicolor_wdt.c

watchdog: constify watchdog_ops structures

2017-02-24 14:00:23 -08:00

dw_wdt.c

watchdog: dw_wdt: add stop watchdog operation

2017-12-28 20:44:55 +01:00

ebc-c384_wdt.c

watchdog: ebc-c384_wdt: Utilize devm_ functions in driver probe callback

2017-02-24 14:00:23 -08:00

ep93xx_wdt.c

watchdog: ep93xx_wdt: cleanup and let the core handle the heartbeat

2017-02-24 14:00:23 -08:00

eurotechwdt.c

watchdog: eurotechwdt: mark expected switch fall-through

2017-12-28 20:45:51 +01:00

f71808e_wdt.c

watchdog: f71808e_wdt: mark expected switch fall-throughs

2017-12-28 20:45:28 +01:00

ftwdt010_wdt.c

watchdog: ftwdt010: Make interrupt optional

2017-12-28 20:45:02 +01:00

gef_wdt.c

watchdog: Fix module autoload for OF platform driver

2015-09-28 10:56:01 +02:00

geodewdt.c

watchdog: drop owner assignment from platform_drivers

2014-10-20 16:21:56 +02:00

gpio_wdt.c

watchdog: gpio_wdt: set WDOG_HW_RUNNING in gpio_wdt_stop

2017-12-28 20:45:36 +01:00

hpwdt.c

watchdog: hpwdt: fix unused variable warning

2017-12-28 20:45:55 +01:00

i6300esb.c

watchdog: i6300esb: remove info message and version number

2017-12-28 20:45:18 +01:00

ib700wdt.c

watchdog: ib700wdt: mark expected switch fall-through

2017-12-28 20:45:52 +01:00

ibmasr.c

watchdog: fix checkpatch warnings and error

2014-03-31 13:31:06 +02:00

ie6xx_wdt.c

Watchdog: Fix parent of watchdog_devices

2015-09-09 21:39:22 +02:00

imgpdc_wdt.c

watchdog: constify watchdog_info structures

2017-02-24 14:00:23 -08:00

imx2_wdt.c

watchdog: imx2_wdt: add pretimeout function support

2016-10-08 10:27:30 +02:00

indydog.c

watchdog: indydog: Simplify indydog_{start,stop}

2014-03-31 13:26:31 +02:00

intel_scu_watchdog.c

watchdog: intel_scu_watchdog: Remove unused variable

2014-03-31 13:26:56 +02:00

intel_scu_watchdog.h

…

intel-mid_wdt.c

watchdog: intel-mid_wdt: Keep watchdog running

2017-06-05 20:37:35 +02:00

iop_wdt.c

watchdog: Get rid of MODULE_ALIAS_MISCDEV statements

2013-11-17 19:38:13 +01:00

it87_wdt.c

watchdog: it87_wdt: constify watchdog_ops structure

2017-09-09 20:06:25 +02:00

it8712f_wdt.c

watchdog: Get rid of MODULE_ALIAS_MISCDEV statements

2013-11-17 19:38:13 +01:00

iTCO_vendor_support.c

…

iTCO_vendor.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

iTCO_wdt.c

watchdog: Revert "iTCO_wdt: all versions count down twice"

2017-09-09 17:41:24 +02:00

ixp4xx_wdt.c

watchdog: Get rid of MODULE_ALIAS_MISCDEV statements

2013-11-17 19:38:13 +01:00

jz4740_wdt.c

watchdog: jz4740: Add support for the watchdog in jz4780 SoC

2017-12-28 20:44:44 +01:00

Kconfig

watchdog: Add Spreadtrum watchdog driver

2017-12-28 20:45:40 +01:00

kempld_wdt.c

watchdog: kempld: fix gcc-4.3 build

2017-03-01 06:15:10 -08:00

ks8695_wdt.c

char: make misc_deregister a void function

2015-08-05 10:35:49 -07:00

lantiq_wdt.c

watchdog: lantiq: access boot cause register through regmap

2017-09-04 13:53:15 +02:00

loongson1_wdt.c

watchdog: loongson1: Add Loongson1 SoC watchdog driver

2016-12-16 06:53:55 -08:00

lpc18xx_wdt.c

watchdog: lpc18xx_wdt: Convert timers to use timer_setup()

2017-11-02 15:50:30 -07:00

m54xx_wdt.c

watchdog: Get rid of MODULE_ALIAS_MISCDEV statements

2013-11-17 19:38:13 +01:00

machzwd.c

treewide: Switch DEFINE_TIMER callbacks to struct timer_list *

2017-11-21 15:57:05 -08:00

Makefile

watchdog: Add Spreadtrum watchdog driver

2017-12-28 20:45:40 +01:00

max63xx_wdt.c

watchdog: max63xx: make module's license marker match the header

2016-01-31 16:51:56 +01:00

max77620_wdt.c

watchdog: max77620_wdt: constify platform_device_id

2017-09-09 20:40:39 +02:00

mei_wdt.c

watchdog: mei_wdt: don't use of variable length array

2017-12-28 20:45:23 +01:00

mena21_wdt.c

watchdog: mena21_wdt: Convert to use device managed functions and other improvements

2017-02-24 14:00:23 -08:00

menf21bmc_wdt.c

Watchdog: Fix parent of watchdog_devices

2015-09-09 21:39:22 +02:00

meson_gxbb_wdt.c

watchdog: meson: Handle return value of clk_prepare_enable

2017-07-03 11:02:31 +02:00

meson_wdt.c

watchdog: meson-wdt: add support for the watchdog on Meson8 and Meson8m2

2017-09-09 20:14:01 +02:00

mixcomwd.c

treewide: Switch DEFINE_TIMER callbacks to struct timer_list *

2017-11-21 15:57:05 -08:00

moxart_wdt.c

watchdog: Add 'action' and 'data' parameters to restart handler callback

2016-03-01 15:36:35 +01:00

mpc8xxx_wdt.c

watchdog: mpc8xxx: use the core worker function

2017-12-28 20:45:36 +01:00

mt7621_wdt.c

watchdog: constify watchdog_ops and watchdog_info structures

2017-09-09 20:29:53 +02:00

mtk_wdt.c

watchdog: Add 'action' and 'data' parameters to restart handler callback

2016-03-01 15:36:35 +01:00

mtx-1_wdt.c

treewide: setup_timer() -> timer_setup()

2017-11-21 15:57:07 -08:00

mv64x60_wdt.c

watchdog: drop owner assignment from platform_drivers

2014-10-20 16:21:56 +02:00

ni903x_wdt.c

watchdog: ni903x_wdt: Add NI 903x/913x watchdog driver

2016-03-01 16:25:39 +01:00

nic7018_wdt.c

watchdog: nic7018_wdt: Add NIC7018 watchdog driver

2017-02-24 14:00:23 -08:00

nuc900_wdt.c

treewide: setup_timer() -> timer_setup()

2017-11-21 15:57:07 -08:00

nv_tco.c

watchdog: add support for MCP78S chipset in nv_tco

2016-07-17 21:04:13 +02:00

nv_tco.h

…

octeon-wdt-main.c

watchdog: octeon-wdt: Add support for 78XX SOCs.

2017-09-04 21:19:03 +02:00

octeon-wdt-nmi.S

watchdog: octeon-wdt: Remove old boot vector code.

2017-09-04 21:19:03 +02:00

of_xilinx_wdt.c

watchdog: of_xilinx_wdt: Add suspend/resume support

2017-09-09 20:48:18 +02:00

omap_wdt.c

watchdog: omap: don't disable the timer when it should be enabled early

2015-12-27 21:09:40 +01:00

omap_wdt.h

watchdog: omap_wdt: implement get_timeleft

2015-06-22 15:54:35 +02:00

orion_wdt.c

watchdog: orion: fix typo

2017-12-28 20:44:57 +01:00

pc87413_wdt.c

Annotate hardware config module parameters in drivers/watchdog/

2017-04-20 12:02:32 +01:00

pcwd_pci.c

watchdog: pcwd_pci: mark expected switch fall-through

2017-12-28 20:45:29 +01:00

pcwd_usb.c

watchdog: pcwd_usb: remove unneeded DRIVER_LICENSE #define

2017-12-28 20:45:50 +01:00

pcwd.c

treewide: setup_timer() -> timer_setup()

2017-11-21 15:57:07 -08:00

pic32-dmt.c

watchdog: pic32-dmt: Remove .owner field for driver

2016-07-25 12:02:32 +02:00

pic32-wdt.c

watchdog: pic32-wdt: Fix return value check in pic32_wdt_drv_probe()

2016-07-25 12:02:43 +02:00

pika_wdt.c

treewide: setup_timer() -> timer_setup()

2017-11-21 15:57:07 -08:00

pnx833x_wdt.c

watchdog: Get rid of MODULE_ALIAS_MISCDEV statements

2013-11-17 19:38:13 +01:00

pnx4008_wdt.c

watchdog: pnx4008: restart: support "cmd" from userspace

2016-03-16 21:09:42 +01:00

pretimeout_noop.c

watchdog: pretimeout: add noop pretimeout governor

2016-10-08 10:27:13 +02:00

pretimeout_panic.c

watchdog: pretimeout: add panic pretimeout governor

2016-10-08 10:27:17 +02:00

qcom-wdt.c

watchdog: qcom: Check for platform_get_resource() failure

2017-09-09 20:50:35 +02:00

rc32434_wdt.c

watchdog: rc32434_wdt: fix ioctl error handling

2016-03-01 15:29:42 +01:00

rdc321x_wdt.c

treewide: setup_timer() -> timer_setup()

2017-11-21 15:57:07 -08:00

renesas_wdt.c

watchdog: renesas_wdt: update copyright dates

2017-09-09 21:11:58 +02:00

retu_wdt.c

Watchdog: Fix parent of watchdog_devices

2015-09-09 21:39:22 +02:00

riowd.c

watchdog: drop owner assignment from platform_drivers

2014-10-20 16:21:56 +02:00

rn5t618_wdt.c

watchdog: constify watchdog_info structures

2017-02-24 14:00:23 -08:00

rt2880_wdt.c

watchdog: constify watchdog_ops and watchdog_info structures

2017-09-09 20:29:53 +02:00

rtd119x_wdt.c

watchdog: Add Realtek RTD1295

2017-12-28 20:44:39 +01:00

rza_wdt.c

watchdog: add rza_wdt driver

2017-06-05 20:37:17 +02:00

s3c2410_wdt.c

watchdog: s3c2410: Minor code cleanup

2017-06-05 20:38:52 +02:00

sa1100_wdt.c

watchdog: sa11x0/pxa: fix error path of driver initialization

2017-02-24 14:00:23 -08:00

sama5d4_wdt.c

watchdog: sama5d4: Add comment explaining what happens on resume

2017-06-05 17:58:39 +02:00

sb_wdog.c

watchdog: Get rid of MODULE_ALIAS_MISCDEV statements

2013-11-17 19:38:13 +01:00

sbc60xxwdt.c

treewide: Switch DEFINE_TIMER callbacks to struct timer_list *

2017-11-21 15:57:05 -08:00

sbc7240_wdt.c

watchdog: Get rid of MODULE_ALIAS_MISCDEV statements

2013-11-17 19:38:13 +01:00

sbc8360.c

watchdog: Get rid of MODULE_ALIAS_MISCDEV statements

2013-11-17 19:38:13 +01:00

sbc_epx_c3.c

watchdog: Get rid of MODULE_ALIAS_MISCDEV statements

2013-11-17 19:38:13 +01:00

sbc_fitpc2_wdt.c

watchdog: Get rid of MODULE_ALIAS_MISCDEV statements

2013-11-17 19:38:13 +01:00

sbsa_gwdt.c

watchdog: constify watchdog_ops structures

2017-02-24 14:00:23 -08:00

sc520_wdt.c

treewide: Switch DEFINE_TIMER callbacks to struct timer_list *

2017-11-21 15:57:05 -08:00

sc1200wdt.c

watchdog: sc1200: constify pnp_device_id

2017-09-09 21:14:46 +02:00

sch311x_wdt.c

watchdog: drop owner assignment from platform_drivers

2014-10-20 16:21:56 +02:00

scx200_wdt.c

watchdog: Get rid of MODULE_ALIAS_MISCDEV statements

2013-11-17 19:38:13 +01:00

shwdt.c

treewide: setup_timer() -> timer_setup()

2017-11-21 15:57:07 -08:00

sirfsoc_wdt.c

watchdog: constify watchdog_ops structures

2017-02-24 14:00:23 -08:00

smsc37b787_wdt.c

watchdog: Get rid of MODULE_ALIAS_MISCDEV statements

2013-11-17 19:38:13 +01:00

softdog.c

watchdog: softdog: fire watchdog even if softirqs do not get to run

2017-03-01 06:15:10 -08:00

sp805_wdt.c

watchdog: sp805: constify amba_id

2017-09-09 21:17:44 +02:00

sp5100_tco.c

watchdog: sp5100_tco: properly check for new register layouts

2016-05-14 16:16:04 +02:00

sp5100_tco.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

sprd_wdt.c

watchdog: Add Spreadtrum watchdog driver

2017-12-28 20:45:40 +01:00

st_lpc_wdt.c

watchdog: st_wdt: Remove support for obsolete platforms

2016-09-24 08:59:49 +02:00

stm32_iwdg.c

watchdog: stm32: Fix copyright

2017-12-28 20:45:51 +01:00

stmp3xxx_rtc_wdt.c

watchdog: stmp3xxx: Remove unused variables

2016-01-11 21:51:28 +01:00

sun4v_wdt.c

watchdog: constify watchdog_ops structures

2017-02-24 14:00:23 -08:00

sunxi_wdt.c

watchdog: sunxi_wdt: use of_device_get_match_data

2017-12-28 20:45:12 +01:00

tangox_wdt.c

watchdog: tangox: Use watchdog core to install restart handler

2017-02-24 14:00:23 -08:00

tegra_wdt.c

watchdog: tegra_wdt: Convert to use device managed functions

2017-02-24 14:00:23 -08:00

ts72xx_wdt.c

watchdog: ts72xx_wdt: constify watchdog_ops structure

2017-09-09 20:06:14 +02:00

ts4800_wdt.c

watchdog: ts4800: add driver for TS-4800 watchdog

2015-12-28 22:29:35 +01:00

twl4030_wdt.c

mfd: twl: Move header file out of I2C realm

2017-09-04 14:41:02 +01:00

txx9wdt.c

watchdog: txx9wdt: Add missing clock (un)prepare calls for CCF

2016-09-23 22:36:32 +02:00

uniphier_wdt.c

watchdog: uniphier: add UniPhier watchdog driver

2017-07-03 13:58:55 +02:00

ux500_wdt.c

Watchdog: Fix parent of watchdog_devices

2015-09-09 21:39:22 +02:00

via_wdt.c

treewide: Switch DEFINE_TIMER callbacks to struct timer_list *

2017-11-21 15:57:05 -08:00

w83627hf_wdt.c

watchdog: w83627hf: make const array chip_name static

2017-09-09 20:08:03 +02:00

w83877f_wdt.c

treewide: Switch DEFINE_TIMER callbacks to struct timer_list *

2017-11-21 15:57:05 -08:00

w83977f_wdt.c

watchdog: w83977f_wdt: underflow in wdt_set_timeout()

2015-11-23 08:59:30 +01:00

wafer5823wdt.c

watchdog: Get rid of MODULE_ALIAS_MISCDEV statements

2013-11-17 19:38:13 +01:00

watchdog_core.c

watchdog: document watchdog_init_timeout() wdd parameter

2017-12-28 20:45:56 +01:00

watchdog_core.h

watchdog: Create watchdog device in watchdog_dev.c

2015-12-29 20:36:01 +01:00

watchdog_dev.c

watchdog: core: make sure the watchdog worker always works

2017-12-28 20:45:57 +01:00

watchdog_pretimeout.c

watchdog: pretimeout: add pretimeout_available_governors attribute

2016-10-08 10:27:24 +02:00

watchdog_pretimeout.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

wd501p.h

…

wdat_wdt.c

watchdog: wdat_wdt: Ping the watchdog on resume

2016-10-21 01:28:33 +02:00

wdrtas.c

watchdog: Get rid of MODULE_ALIAS_MISCDEV statements

2013-11-17 19:38:13 +01:00

wdt285.c

watchdog: wdt285: Fix variable type

2014-03-31 13:28:20 +02:00

wdt977.c

watchdog: Get rid of MODULE_ALIAS_MISCDEV statements

2013-11-17 19:38:13 +01:00

wdt_pci.c

watchdog: wdt_pci: mark expected switch fall-through

2017-12-28 20:45:30 +01:00

wdt.c

Annotate hardware config module parameters in drivers/watchdog/

2017-04-20 12:02:32 +01:00

wm831x_wdt.c

watchdog: wm831x_wdt: Convert to use device managed functions

2017-02-24 14:00:23 -08:00

wm8350_wdt.c

Watchdog: Fix parent of watchdog_devices

2015-09-09 21:39:22 +02:00

xen_wdt.c

watchdog: xen_wdt: remove info message and version number

2017-12-28 20:45:44 +01:00

ziirave_wdt.c

watchdog: ziirave: constify i2c_device_id

2017-09-09 21:16:17 +02:00

zx2967_wdt.c

watchdog: zx2967: explicitly request exclusive reset control

2017-09-09 20:18:43 +02:00