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cgroup: remove useless code in cgroup_write_event_control()

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eventfd_poll() never returns POLLHUP.

Signed-off-by: Li Zefan <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Li Zefan 2013-03-12 15:36:00 -07:00 committed by Tejun Heo
parent 6ee211ad0a
commit 80f36c2a1a
1 changed files with 0 additions and 6 deletions
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6
kernel/cgroup.c
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@ -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