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kernel: watchdog: modify the explanation related to watchdog thread 

The watchdog thread has been replaced by cpu_stop_work, modify the
explanation related.

Link: https://lkml.kernel.org/r/1619687073-24686-2-git-send-email-wangqing@vivo.com
Signed-off-by: Wang Qing <wangqing@vivo.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Cc: Joe Perches <joe@perches.com>
Cc: Stephen Kitt <steve@sk2.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: "Guilherme G. Piccoli" <gpiccoli@canonical.com>
Cc: Qais Yousef <qais.yousef@arm.com>
Cc: Santosh Sivaraj <santosh@fossix.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Wang Qing 2021-06-28 19:34:17 -07:00 committed by Linus Torvalds
parent 7ed6d4e418
commit b124ac45bd
1 changed files with 4 additions and 8 deletions
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12
kernel/watchdog.c
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@ -92,7 +92,7 @@ __setup("nmi_watchdog=", hardlockup_panic_setup);
* own hardlockup detector.
*
* watchdog_nmi_enable/disable can be implemented to start and stop when
* softlockup watchdog threads start and stop. The arch must select the
* softlockup watchdog start and stop. The arch must select the
* SOFTLOCKUP_DETECTOR Kconfig.
*/
int __weak watchdog_nmi_enable(unsigned int cpu)
@ -335,7 +335,7 @@ static DEFINE_PER_CPU(struct completion, softlockup_completion);
static DEFINE_PER_CPU(struct cpu_stop_work, softlockup_stop_work);
/*
* The watchdog thread function - touches the timestamp.
* The watchdog feed function - touches the timestamp.
*
* It only runs once every sample_period seconds (4 seconds by
* default) to reset the softlockup timestamp. If this gets delayed
@ -558,11 +558,7 @@ static void lockup_detector_reconfigure(void)
}
/*
* Create the watchdog thread infrastructure and configure the detector(s).
*
* The threads are not unparked as watchdog_allowed_mask is empty. When
* the threads are successfully initialized, take the proper locks and
* unpark the threads in the watchdog_cpumask if the watchdog is enabled.
* Create the watchdog infrastructure and configure the detector(s).
*/
static __init void lockup_detector_setup(void)
{
@ -628,7 +624,7 @@ void lockup_detector_soft_poweroff(void)
#ifdef CONFIG_SYSCTL
/* Propagate any changes to the watchdog threads */
/* Propagate any changes to the watchdog infrastructure */
static void proc_watchdog_update(void)
{
/* Remove impossible cpus to keep sysctl output clean. */