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| author | Thomas Gleixner <tglx@linutronix.de> | 2014-02-03 14:34:31 -0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2014-02-07 15:34:28 +0100 |
| commit | 627ee7947e2e83ba565c31c5c9373d6e364b1ecd (patch) | |
| tree | 30fc40a08542f0411e28ba9becc00e07f7ec3b44 /kernel/time/tick-internal.h | |
| parent | e8b175946c16d7001b22620f52d78ab497efc9d0 (diff) | |
| download | linux-627ee7947e2e83ba565c31c5c9373d6e364b1ecd.tar.bz2 | |
clockevents: Serialize calls to clockevents_update_freq() in the core
We can identify the broadcast device in the core and serialize all
callers including interrupts on a different CPU against the update.
Also, disabling interrupts is moved into the core allowing callers to
leave interrutps enabled when calling clockevents_update_freq().
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Soeren Brinkmann <soren.brinkmann@xilinx.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Michal Simek <michal.simek@xilinx.com>
Link: http://lkml.kernel.org/r/1391466877-28908-2-git-send-email-soren.brinkmann@xilinx.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/time/tick-internal.h')
| -rw-r--r-- | kernel/time/tick-internal.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/time/tick-internal.h b/kernel/time/tick-internal.h index 8329669b51ec..26f1c0ba9d81 100644 --- a/kernel/time/tick-internal.h +++ b/kernel/time/tick-internal.h @@ -111,6 +111,7 @@ extern int tick_resume_broadcast(void); extern void tick_broadcast_init(void); extern void tick_set_periodic_handler(struct clock_event_device *dev, int broadcast); +int tick_broadcast_update_freq(struct clock_event_device *dev, u32 freq); #else /* !BROADCAST */ @@ -133,6 +134,8 @@ static inline void tick_shutdown_broadcast(unsigned int *cpup) { } static inline void tick_suspend_broadcast(void) { } static inline int tick_resume_broadcast(void) { return 0; } static inline void tick_broadcast_init(void) { } +static inline int tick_broadcast_update_freq(struct clock_event_device *dev, + u32 freq) { return -ENODEV; } /* * Set the periodic handler in non broadcast mode @@ -154,5 +157,6 @@ static inline int tick_device_is_functional(struct clock_event_device *dev) #endif +int __clockevents_update_freq(struct clock_event_device *dev, u32 freq); extern void do_timer(unsigned long ticks); extern void update_wall_time(void); |