@@ -12,10 +12,10 @@
#ifdef CONFIG_LOCKUP_DETECTOR
void lockup_detector_init(void);
+void lockup_detector_soft_poweroff(void);
#else
-static inline void lockup_detector_init(void)
-{
-}
+static inline void lockup_detector_init(void) { }
+static inline void lockup_detector_soft_poweroff(void) { }
#endif
#ifdef CONFIG_SOFTLOCKUP_DETECTOR
@@ -333,7 +333,8 @@ static enum hrtimer_restart watchdog_tim
int duration;
int softlockup_all_cpu_backtrace = sysctl_softlockup_all_cpu_backtrace;
- if (atomic_read(&watchdog_park_in_progress) != 0)
+ if (!watchdog_enabled ||
+ atomic_read(&watchdog_park_in_progress) != 0)
return HRTIMER_NORESTART;
/* kick the hardlockup detector */
@@ -660,6 +661,17 @@ static void set_sample_period(void)
}
#endif /* SOFTLOCKUP */
+/**
+ * lockup_detector_soft_poweroff - Interface to stop lockup detector(s)
+ *
+ * Special interface for parisc. It prevents lockup detector warnings from
+ * the default pm_poweroff() function which busy loops forever.
+ */
+void lockup_detector_soft_poweroff(void)
+{
+ watchdog_enabled = 0;
+}
+
/*
* Suspend the hard and soft lockup detector by parking the watchdog threads.
*/
PARISC has a a busy looping power off routine. If the watchdog is enabled the watchdog timer will still fire, but the thread is not running, which causes the softlockup watchdog to trigger. Provide a interface which allows to turn the watchdog off. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Helge Deller <deller@gmx.de> Cc: linux-parisc@vger.kernel.org --- include/linux/nmi.h | 6 +++--- kernel/watchdog.c | 14 +++++++++++++- 2 files changed, 16 insertions(+), 4 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html