[PATCH] cgroups: remove redundant get/put of css_set from css_set_check_fetched()
Mandeep Singh Baines
msb at chromium.org
Thu Dec 15 22:21:26 UTC 2011
We already have a reference to all elements in newcg_list.
Signed-off-by: Mandeep Singh Baines <msb at chromium.org>
Cc: Tejun Heo <tj at kernel.org>
Cc: Li Zefan <lizf at cn.fujitsu.com>
Cc: containers at lists.linux-foundation.org
Cc: cgroups at vger.kernel.org
Cc: Paul Menage <paul at paulmenage.org>
---
kernel/cgroup.c | 10 ++--------
1 files changed, 2 insertions(+), 8 deletions(-)
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index d9d5648..a7e00b9 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1935,23 +1935,17 @@ 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;
}
--
1.7.3.1
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