Commit 7ef70e48 authored Apr 26, 2013 by Li Zefan Committed by Tejun Heo Apr 26, 2013

cgroup: restore the call to eventfd->poll()



I mistakenly removed the call to eventfd->poll() while I was actually
intending to remove the return value...

Calling evenfd->poll() will hook cgroup_event_wake() to the poll
waitqueue, which will be called to unregister eventfd when rmdir a
cgroup or close eventfd.

Signed-off-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

parent cc20e01c

kernel/cgroup.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -3882,6 +3882,8 @@ static int cgroup_write_event_control(struct cgroup cgrp, struct cftype cft,
		if (ret)
		goto fail;

		efile->f_op->poll(efile, &event->pt);

		/*
		* Events should be removed after rmdir of cgroup directory, but before
		* destroying subsystem state objects. Let's take reference to cgroup