diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h index 85778a4b1209..35094479ca55 100644 --- a/include/linux/clocksource.h +++ b/include/linux/clocksource.h @@ -216,6 +216,7 @@ static inline void clocksource_calculate_interval(struct clocksource *c, /* used to install a new clocksource */ extern int clocksource_register(struct clocksource*); extern void clocksource_unregister(struct clocksource*); +extern void clocksource_touch_watchdog(void); extern struct clocksource* clocksource_get_next(void); extern void clocksource_change_rating(struct clocksource *cs, int rating); extern void clocksource_resume(void); diff --git a/kernel/kgdb.c b/kernel/kgdb.c index 017ee782bc08..e3f603740425 100644 --- a/kernel/kgdb.c +++ b/kernel/kgdb.c @@ -28,6 +28,7 @@ * kind, whether express or implied. */ #include +#include #include #include #include @@ -574,6 +575,7 @@ static void kgdb_wait(struct pt_regs *regs) /* Signal the primary CPU that we are done: */ atomic_set(&cpu_in_kgdb[cpu], 0); + clocksource_touch_watchdog(); local_irq_restore(flags); } #endif @@ -1396,6 +1398,7 @@ kgdb_handle_exception(int evector, int signo, int ecode, struct pt_regs *regs) atomic_read(&kgdb_cpu_doing_single_step) != cpu) { atomic_set(&kgdb_active, -1); + clocksource_touch_watchdog(); local_irq_restore(flags); goto acquirelock; @@ -1487,6 +1490,7 @@ kgdb_handle_exception(int evector, int signo, int ecode, struct pt_regs *regs) kgdb_restore: /* Free kgdb_active */ atomic_set(&kgdb_active, -1); + clocksource_touch_watchdog(); local_irq_restore(flags); return error; diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c index 7f60097d443a..f61402b1f2d0 100644 --- a/kernel/time/clocksource.c +++ b/kernel/time/clocksource.c @@ -221,6 +221,18 @@ void clocksource_resume(void) spin_unlock_irqrestore(&clocksource_lock, flags); } +/** + * clocksource_touch_watchdog - Update watchdog + * + * Update the watchdog after exception contexts such as kgdb so as not + * to incorrectly trip the watchdog. + * + */ +void clocksource_touch_watchdog(void) +{ + clocksource_resume_watchdog(); +} + /** * clocksource_get_next - Returns the selected clocksource *