Commit-ID: 12572dbb53638c6e454ef831c8fee7de3df24389 Gitweb: http://git.kernel.org/tip/12572dbb53638c6e454ef831c8fee7de3df24389 Author: Mark Rutland <[email protected]> AuthorDate: Mon, 14 Jan 2013 17:05:21 +0000 Committer: Thomas Gleixner <[email protected]> CommitDate: Thu, 31 Jan 2013 22:15:35 +0100
clockevents: Add generic timer broadcast receiver Currently the broadcast mechanism used for timers is abstracted by a function pointer on struct clock_event_device. As the fundamental mechanism for broadcast is architecture-specific, this ties each clock_event_device driver to a single architecture, even where the driver is otherwise generic. This patch adds a standard path for the receipt of timer broadcasts, so drivers and/or architecture backends need not manage redundant lists of timers for the purpose of routing broadcast timer ticks. [tglx: Made the implementation depend on the config switch as well ] Signed-off-by: Mark Rutland <[email protected]> Reviewed-by: Santosh Shilimkar <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Tested-by: Santosh Shilimkar <[email protected]> Reviewed-by: Stephen Boyd <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> --- include/linux/clockchips.h | 4 ++++ kernel/time/tick-broadcast.c | 17 +++++++++++++++++ 2 files changed, 21 insertions(+) diff --git a/include/linux/clockchips.h b/include/linux/clockchips.h index 8a7096f..e1089aa 100644 --- a/include/linux/clockchips.h +++ b/include/linux/clockchips.h @@ -161,6 +161,10 @@ clockevents_calc_mult_shift(struct clock_event_device *ce, u32 freq, u32 minsec) extern void clockevents_suspend(void); extern void clockevents_resume(void); +#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST +extern int tick_receive_broadcast(void); +#endif + #ifdef CONFIG_GENERIC_CLOCKEVENTS extern void clockevents_notify(unsigned long reason, void *arg); #else diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c index f113755..7cc81c5 100644 --- a/kernel/time/tick-broadcast.c +++ b/kernel/time/tick-broadcast.c @@ -125,6 +125,23 @@ int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu) return ret; } +#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST +int tick_receive_broadcast(void) +{ + struct tick_device *td = this_cpu_ptr(&tick_cpu_device); + struct clock_event_device *evt = td->evtdev; + + if (!evt) + return -ENODEV; + + if (!evt->event_handler) + return -EINVAL; + + evt->event_handler(evt); + return 0; +} +#endif + /* * Broadcast the event to the cpus, which are set in the mask (mangled). */ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
