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watchdog/hardlockup: add hardlock_notifier_list

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Signed-off-by: Huibin Hong <huibin.hong@rock-chips.com>
Change-Id: Id469d3c5a38f0bcb43a13a5c2263b53cf327154b
This commit is contained in:
Huibin Hong
2022-07-29 07:30:11 +00:00
parent 95c089fb93
commit d851edc401
1 changed files with 3 additions and 0 deletions
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3
kernel/watchdog.c
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@@ -55,6 +55,8 @@ unsigned long *watchdog_cpumask_bits = cpumask_bits(&watchdog_cpumask);
int __read_mostly sysctl_hardlockup_all_cpu_backtrace; int __read_mostly sysctl_hardlockup_all_cpu_backtrace;
# endif /* CONFIG_SMP */ # endif /* CONFIG_SMP */
ATOMIC_NOTIFIER_HEAD(hardlock_notifier_list);
/* /*
* Should we panic when a soft-lockup or hard-lockup occurs: * Should we panic when a soft-lockup or hard-lockup occurs:
*/ */
@@ -415,6 +417,7 @@ static void watchdog_check_hardlockup_other_cpu(void)
else else
WARN(1, "Watchdog detected hard LOCKUP on cpu %u", next_cpu); WARN(1, "Watchdog detected hard LOCKUP on cpu %u", next_cpu);
atomic_notifier_call_chain(&hardlock_notifier_list, 0, NULL);
per_cpu(hard_watchdog_warn, next_cpu) = true; per_cpu(hard_watchdog_warn, next_cpu) = true;
} else { } else {
per_cpu(hard_watchdog_warn, next_cpu) = false; per_cpu(hard_watchdog_warn, next_cpu) = false;