This patch adds two new functions to enable/disable
the watchdog across all CPUs.
Signed-off-by: Stephane Eranian <eran...@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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