tree c58432c6d66d5fed1dc171fff971fa75e3441091
parent 52971280217922490ef0d49cda482d14009dae3e
author Colin Cross <ccross@android.com> 1367884221 +0000
committer chrmhoffmann <chrmhoffmann@gmail.com> 1531943695 +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.

Change-Id: I788246a76780ea892659526e70be018b18f646c4
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>