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authorColin Cross <ccross@android.com>2013-05-06 23:50:20 +0000
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-05-12 14:16:23 +0200
commita2d5f1f5d941593e61071dc78e9de228eda5475f (patch)
tree509537a60dc86c88e69000c793ecb363e230a4dc
parentb0f8c44f30e58c3aaaaaf864d5c3d3cc2e8a4c2d (diff)
sigtimedwait: use freezable blocking call
Avoid waking up every thread sleeping in a sigtimedwait 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. Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
-rw-r--r--kernel/signal.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index 113411bfe8b1..50e41075ac77 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2848,7 +2848,7 @@ int do_sigtimedwait(const sigset_t *which, siginfo_t *info,
recalc_sigpending();
spin_unlock_irq(&tsk->sighand->siglock);
- timeout = schedule_timeout_interruptible(timeout);
+ timeout = freezable_schedule_timeout_interruptible(timeout);
spin_lock_irq(&tsk->sighand->siglock);
__set_task_blocked(tsk, &tsk->real_blocked);