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| author | Jason Wessel <jason.wessel@windriver.com> | 2008-02-15 14:55:54 -0600 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-17 20:05:38 +0200 |
| commit | 7c3078b637882303b1dcf6a16229d0e35f6b60a5 (patch) | |
| tree | 4b1456f81627056eff8750e42481c0b00ac84cf0 | |
| parent | d359752407f8916c29ad53a5c30ac73e338f2797 (diff) | |
| download | kernel-crypto-7c3078b637882303b1dcf6a16229d0e35f6b60a5.tar.gz kernel-crypto-7c3078b637882303b1dcf6a16229d0e35f6b60a5.tar.xz kernel-crypto-7c3078b637882303b1dcf6a16229d0e35f6b60a5.zip | |
kgdb: clocksource watchdog
In order to not trip the clocksource watchdog, kgdb must touch the
clocksource watchdog on the return to normal system run state.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | include/linux/clocksource.h | 1 | ||||
| -rw-r--r-- | kernel/kgdb.c | 4 | ||||
| -rw-r--r-- | kernel/time/clocksource.c | 12 |
3 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h index 85778a4b120..35094479ca5 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 017ee782bc0..e3f60374042 100644 --- a/kernel/kgdb.c +++ b/kernel/kgdb.c @@ -28,6 +28,7 @@ * kind, whether express or implied. */ #include <linux/pid_namespace.h> +#include <linux/clocksource.h> #include <linux/interrupt.h> #include <linux/spinlock.h> #include <linux/console.h> @@ -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 @@ acquirelock: 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 @@ acquirelock: 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 7f60097d443..f61402b1f2d 100644 --- a/kernel/time/clocksource.c +++ b/kernel/time/clocksource.c @@ -222,6 +222,18 @@ void clocksource_resume(void) } /** + * 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 * */ |