tree 385fa2cf0c69634c55e1753fe77138021fc6f396
parent a2d5f1f5d941593e61071dc78e9de228eda5475f
author Colin Cross <ccross@android.com> 1367884221 +0000
committer Rafael J. Wysocki <rafael.j.wysocki@intel.com> 1368360983 +0200

af_unix: use freezable blocking calls in read

Avoid waking up every thread sleeping in read call on an AF_UNIX
socket 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>