Messages in this thread Patch in this message | | | From | Stephane Eranian <> | Subject | [PATCH v2 10/12] watchdog: add watchdog enable/disable all functions | Date | Thu, 9 Oct 2014 18:34:44 +0200 |
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This patch adds two new functions to enable/disable the watchdog across all CPUs.
Signed-off-by: Stephane Eranian <eranian@google.com> --- include/linux/watchdog.h | 3 +++ kernel/watchdog.c | 28 ++++++++++++++++++++++++++++ 2 files changed, 31 insertions(+)
diff --git a/include/linux/watchdog.h b/include/linux/watchdog.h index 2a3038e..b89b414 100644 --- a/include/linux/watchdog.h +++ b/include/linux/watchdog.h @@ -142,4 +142,7 @@ extern int watchdog_init_timeout(struct watchdog_device *wdd, extern int watchdog_register_device(struct watchdog_device *); extern void watchdog_unregister_device(struct watchdog_device *); +void watchdog_nmi_disable_all(void); +void watchdog_nmi_enable_all(void); + #endif /* ifndef _LINUX_WATCHDOG_H */ diff --git a/kernel/watchdog.c b/kernel/watchdog.c index 8759d0b..6aa5b8f 100644 --- a/kernel/watchdog.c +++ b/kernel/watchdog.c @@ -514,9 +514,37 @@ static void watchdog_nmi_disable(unsigned int cpu) cpu0_err = 0; } } + +void watchdog_nmi_enable_all(void) +{ + int cpu; + + if (!watchdog_user_enabled) + return; + + get_online_cpus(); + for_each_online_cpu(cpu) + watchdog_nmi_enable(cpu); + put_online_cpus(); +} + +void watchdog_nmi_disable_all(void) +{ + int cpu; + + if (!watchdog_running) + return; + + get_online_cpus(); + for_each_online_cpu(cpu) + watchdog_nmi_disable(cpu); + put_online_cpus(); +} #else static int watchdog_nmi_enable(unsigned int cpu) { return 0; } static void watchdog_nmi_disable(unsigned int cpu) { return; } +void watchdog_nmi_enable_all(void) {} +void watchdog_nmi_disable_all(void) {} #endif /* CONFIG_HARDLOCKUP_DETECTOR */ static struct smp_hotplug_thread watchdog_threads = { -- 1.9.1
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