From 80f36c2a1a612ca419e5b864a7e4808e797d9feb Mon Sep 17 00:00:00 2001
From: Li Zefan <lizefan@huawei.com>
Date: Tue, 12 Mar 2013 15:36:00 -0700
Subject: [PATCH] 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>
---
kernel/cgroup.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 29c77a714731..c7fe303b5109 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
--
2.30.9