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cgroups: remove redundant get/put of css_set from css_set_check_fetched() 

We already have a reference to all elements in newcg_list.

Signed-off-by: Mandeep Singh Baines <msb@chromium.org>
Reviewed-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: containers@lists.linux-foundation.org
Cc: cgroups@vger.kernel.org
Cc: Paul Menage <paul@paulmenage.org>
This commit is contained in:
Mandeep Singh Baines 2011-12-15 14:21:26 -08:00 committed by Tejun Heo
parent 52dcf8a1f8
commit 29e21368b9
1 changed files with 2 additions and 8 deletions
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10
kernel/cgroup.c
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@ -2025,23 +2025,17 @@ static bool css_set_check_fetched(struct cgroup *cgrp,
read_lock(&css_set_lock);
newcg = find_existing_css_set(cg, cgrp, template);
if (newcg)
get_css_set(newcg);
read_unlock(&css_set_lock);
/* doesn't exist at all? */
if (!newcg)
return false;
/* see if it's already in the list */
list_for_each_entry(cg_entry, newcg_list, links) {
if (cg_entry->cg == newcg) {
put_css_set(newcg);
list_for_each_entry(cg_entry, newcg_list, links)
if (cg_entry->cg == newcg)
return true;
}
}
/* not found */
put_css_set(newcg);
return false;
}