From: Li Zefan <lizefan@huawei.com>
Date: Tue, 12 Mar 2013 22:36:00 +0000 (-0700)
Subject: cgroup: remove useless code in cgroup_write_event_control()
X-Git-Tag: v3.12-rc1~987^2~33
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=80f36c2a1a612ca419e5b864a7e4808e797d9feb;p=kernel%2Fkernel-generic.git

cgroup: remove useless code in cgroup_write_event_control()

eventfd_poll() never returns POLLHUP.

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

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 29c77a7..c7fe303 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -3937,12 +3937,6 @@ static int cgroup_write_event_control(struct cgroup *cgrp, struct cftype *cft,
 	if (ret)
 		goto fail;
 
-	if (efile->f_op->poll(efile, &event->pt) & POLLHUP) {
-		event->cft->unregister_event(cgrp, event->cft, event->eventfd);
-		ret = 0;
-		goto fail;
-	}
-
 	/*
 	 * Events should be removed after rmdir of cgroup directory, but before
 	 * destroying subsystem state objects. Let's take reference to cgroup