From: Zefan Li Date: Fri, 19 Sep 2014 08:29:31 +0000 (+0800) Subject: cgroup: remove redundant check in cgroup_ino() X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=f29374b146dd02f5f99742aedaddd6ef3512fc9c;p=linux-beck.git cgroup: remove redundant check in cgroup_ino() After we implemented default unified hierarchy, cgrp->kn can never be NULL. Signed-off-by: Zefan Li Signed-off-by: Tejun Heo --- diff --git a/include/linux/cgroup.h b/include/linux/cgroup.h index 77a1d37b742b..818a81fe7ccc 100644 --- a/include/linux/cgroup.h +++ b/include/linux/cgroup.h @@ -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 */ diff --git a/mm/memory-failure.c b/mm/memory-failure.c index 44c6bd201d3a..8639f6b28746 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -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;