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| author | Thomas Gleixner <tglx@linutronix.de> | 2015-04-03 02:37:24 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-04-03 08:44:36 +0200 |
| commit | 52c063d1adbc16c76e70fffa20727fcd4e9343b3 (patch) | |
| tree | 08e2f8c56e9e972082adbeda1fe3cff646a45f4e /kernel/time/tick-common.c | |
| parent | ffa48c0d76803057ee89bf220305466d74256d7b (diff) | |
| download | linux-0-day-52c063d1adbc16c76e70fffa20727fcd4e9343b3.tar.gz linux-0-day-52c063d1adbc16c76e70fffa20727fcd4e9343b3.tar.xz | |
clockevents: Make tick handover explicit
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 tick_handover call and invoke it explicitely from
the hotplug code. Temporary solution will be cleaned up in later
patches.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
[ Rebase ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/1658173.RkEEILFiQZ@vostro.rjw.lan
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/time/tick-common.c')
| -rw-r--r-- | kernel/time/tick-common.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c index e28ba5c044c51..055c868f3ec94 100644 --- a/kernel/time/tick-common.c +++ b/kernel/time/tick-common.c @@ -332,20 +332,23 @@ out_bc: tick_install_broadcast_device(newdev); } +#ifdef CONFIG_HOTPLUG_CPU /* * Transfer the do_timer job away from a dying cpu. * - * Called with interrupts disabled. + * Called with interrupts disabled. Not locking required. If + * tick_do_timer_cpu is owned by this cpu, nothing can change it. */ -void tick_handover_do_timer(int *cpup) +void tick_handover_do_timer(void) { - if (*cpup == tick_do_timer_cpu) { + if (tick_do_timer_cpu == smp_processor_id()) { int cpu = cpumask_first(cpu_online_mask); tick_do_timer_cpu = (cpu < nr_cpu_ids) ? cpu : TICK_DO_TIMER_NONE; } } +#endif /* * Shutdown an event device on a given cpu: |