From 1ef650477a6b91b4f3e3e25c0e3edfed858682a3 Mon Sep 17 00:00:00 2001 From: Colin Cross Date: Mon, 6 May 2013 23:50:19 +0000 Subject: [PATCH] nanosleep: use freezable blocking call Avoid waking up every thread sleeping in a nanosleep call during suspend and resume by calling a freezable blocking call. Previous patches modified the freezer to avoid sending wakeups to threads that are blocked in freezable blocking calls. This call was selected to be converted to a freezable call because it doesn't hold any locks or release any resources when interrupted that might be needed by another freezing task or a kernel driver during suspend, and is a common site where idle userspace tasks are blocked. Change-Id: I93383201d4dd62130cd9a9153842d303fc2e2986 Acked-by: Tejun Heo Acked-by: Thomas Gleixner Signed-off-by: Colin Cross Signed-off-by: Rafael J. Wysocki --- kernel/hrtimer.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c index d1e73a4eed9..f08e1b5e184 100644 --- a/kernel/hrtimer.c +++ b/kernel/hrtimer.c @@ -45,6 +45,7 @@ #include #include #include +#include #include @@ -1502,7 +1503,7 @@ static int __sched do_nanosleep(struct hrtimer_sleeper *t, enum hrtimer_mode mod t->task = NULL; if (likely(t->task)) - schedule(); + freezable_schedule(); hrtimer_cancel(&t->timer); mode = HRTIMER_MODE_ABS;