From c6f4459fc3ba532e896cb678e29b45cb985f82bf Mon Sep 17 00:00:00 2001 From: Chuansheng Liu Date: Thu, 4 Sep 2014 15:17:54 +0800 Subject: smp: Add new wake_up_all_idle_cpus() function Currently kick_all_cpus_sync() can break non-polling idle cpus thru IPI interrupts. But sometimes we need to break the polling idle cpus immediately to reselect the suitable c-state, also for non-idle cpus, we need to do nothing if we try to wake up them. Here adding one new function wake_up_all_idle_cpus() to let all cpus out of idle based on function wake_up_if_idle(). Signed-off-by: Chuansheng Liu Signed-off-by: Peter Zijlstra (Intel) Cc: daniel.lezcano@linaro.org Cc: rjw@rjwysocki.net Cc: linux-pm@vger.kernel.org Cc: changcheng.liu@intel.com Cc: xiaoming.wang@intel.com Cc: souvik.k.chakravarty@intel.com Cc: luto@amacapital.net Cc: Andrew Morton Cc: Christoph Hellwig Cc: Frederic Weisbecker Cc: Geert Uytterhoeven Cc: Jan Kara Cc: Jens Axboe Cc: Jens Axboe Cc: Linus Torvalds Cc: Michal Hocko Cc: Paul Gortmaker Cc: Roman Gushchin Cc: Srivatsa S. Bhat Link: http://lkml.kernel.org/r/1409815075-4180-2-git-send-email-chuansheng.liu@intel.com Signed-off-by: Ingo Molnar --- include/linux/smp.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include') diff --git a/include/linux/smp.h b/include/linux/smp.h index 34347f26be9b..93dff5fff524 100644 --- a/include/linux/smp.h +++ b/include/linux/smp.h @@ -100,6 +100,7 @@ int smp_call_function_any(const struct cpumask *mask, smp_call_func_t func, void *info, int wait); void kick_all_cpus_sync(void); +void wake_up_all_idle_cpus(void); /* * Generic and arch helpers @@ -148,6 +149,7 @@ smp_call_function_any(const struct cpumask *mask, smp_call_func_t func, } static inline void kick_all_cpus_sync(void) { } +static inline void wake_up_all_idle_cpus(void) { } #endif /* !SMP */ -- cgit v1.2.3