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| author | Colin Cross <ccross@android.com> | 2013-05-06 23:50:15 +0000 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-05-12 14:16:22 +0200 |
| commit | e2610b268bb74d24866a9578e78d8c3de90ed596 (patch) | |
| tree | 0daf0d50ba6c52166d79aa83dbd50bd6479f15bf /drivers/staging | |
| parent | dd5ec0f4e72bed3d0e589e21fdf46eedafc106b7 (diff) | |
| download | linux-e2610b268bb74d24866a9578e78d8c3de90ed596.tar.gz linux-e2610b268bb74d24866a9578e78d8c3de90ed596.tar.bz2 linux-e2610b268bb74d24866a9578e78d8c3de90ed596.zip | |
binder: use freezable blocking calls
Avoid waking up every thread sleeping in a binder 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>
Diffstat (limited to 'drivers/staging')
| -rw-r--r-- | drivers/staging/android/binder.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/staging/android/binder.c b/drivers/staging/android/binder.c index 1567ac296b39..1ffc2ebdf612 100644 --- a/drivers/staging/android/binder.c +++ b/drivers/staging/android/binder.c @@ -20,6 +20,7 @@ #include <asm/cacheflush.h> #include <linux/fdtable.h> #include <linux/file.h> +#include <linux/freezer.h> #include <linux/fs.h> #include <linux/list.h> #include <linux/miscdevice.h> @@ -2140,13 +2141,13 @@ retry: if (!binder_has_proc_work(proc, thread)) ret = -EAGAIN; } else - ret = wait_event_interruptible_exclusive(proc->wait, binder_has_proc_work(proc, thread)); + ret = wait_event_freezable_exclusive(proc->wait, binder_has_proc_work(proc, thread)); } else { if (non_block) { if (!binder_has_thread_work(thread)) ret = -EAGAIN; } else - ret = wait_event_interruptible(thread->wait, binder_has_thread_work(thread)); + ret = wait_event_freezable(thread->wait, binder_has_thread_work(thread)); } binder_lock(__func__); |