diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2015-04-03 02:05:15 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-04-03 08:44:33 +0200 |
| commit | 1fe5d5c3c9ba0c4ade18e3325cba0ffe35127941 (patch) | |
| tree | b07d74d6468aa0bf1e2b107bb82d62b9fe6638d4 /include/linux/tick.h | |
| parent | 89feddbfe7023ccfb4a6d7f5e3f5161d91b28b18 (diff) | |
clockevents: Provide explicit broadcast oneshot control functions
clockevents_notify() is a leftover from the early design of the
clockevents facility. It's really not a notification mechanism,
it's a multiplex call. We are way better off to have explicit
calls instead of this monstrosity.
Split out the broadcast oneshot control into a separate function
and provide inline helpers. Switch clockevents_notify() over.
This will go away once all callers are converted.
This also gets rid of the nested locking of clockevents_lock and
broadcast_lock. The broadcast oneshot control functions do not
require clockevents_lock. Only the managing functions
(setup/shutdown/suspend/resume of the broadcast device require
clockevents_lock.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Len Brown <lenb@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Tony Lindgren <tony@atomide.com>
Link: http://lkml.kernel.org/r/13000649.8qZuEDV0OA@vostro.rjw.lan
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/tick.h')
| -rw-r--r-- | include/linux/tick.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/tick.h b/include/linux/tick.h index 4bb236357b03..6119321fc3be 100644 --- a/include/linux/tick.h +++ b/include/linux/tick.h @@ -48,12 +48,23 @@ enum tick_broadcast_mode { TICK_BROADCAST_FORCE, }; +enum tick_broadcast_state { + TICK_BROADCAST_EXIT, + TICK_BROADCAST_ENTER, +}; + #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST extern void tick_broadcast_control(enum tick_broadcast_mode mode); #else static inline void tick_broadcast_control(enum tick_broadcast_mode mode) { } #endif /* BROADCAST */ +#if defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) && defined(CONFIG_TICK_ONESHOT) +extern int tick_broadcast_oneshot_control(enum tick_broadcast_state state); +#else +static inline int tick_broadcast_oneshot_control(enum tick_broadcast_state state) { return 0; } +#endif + static inline void tick_broadcast_enable(void) { tick_broadcast_control(TICK_BROADCAST_ON); @@ -66,6 +77,14 @@ static inline void tick_broadcast_force(void) { tick_broadcast_control(TICK_BROADCAST_FORCE); } +static inline int tick_broadcast_enter(void) +{ + return tick_broadcast_oneshot_control(TICK_BROADCAST_ENTER); +} +static inline void tick_broadcast_exit(void) +{ + tick_broadcast_oneshot_control(TICK_BROADCAST_EXIT); +} #ifdef CONFIG_NO_HZ_COMMON extern int tick_nohz_tick_stopped(void); |