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cgroup: remove redundant check in cgroup_ino()

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After we implemented default unified hierarchy, cgrp->kn can never
be NULL.

Signed-off-by: Zefan Li <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Zefan Li 2014-09-19 16:29:31 +08:00 committed by Tejun Heo
parent 52de4779f2
commit f29374b146
2 changed files with 3 additions and 6 deletions
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7
include/linux/cgroup.h
View File

@ -532,13 +532,10 @@ static inline bool cgroup_has_tasks(struct cgroup *cgrp)
return !list_empty(&cgrp->cset_links);
}
/* returns ino associated with a cgroup, 0 indicates unmounted root */
/* returns ino associated with a cgroup */
static inline ino_t cgroup_ino(struct cgroup *cgrp)
{
if (cgrp->kn)
return cgrp->kn->ino;
else
return 0;
return cgrp->kn->ino;
}
/* cft/css accessors for cftype->write() operation */

2
mm/memory-failure.c
View File

@ -148,7 +148,7 @@ static int hwpoison_filter_task(struct page *p)
ino = cgroup_ino(css->cgroup);
css_put(css);
if (!ino || ino != hwpoison_filter_memcg)
if (ino != hwpoison_filter_memcg)
return -EINVAL;
return 0;