cgroup: use read lock to guard find_existing_css_set()

[linux-2.6-omap-h63xx.git] / kernel / cgroup.c

diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 15ac0e1e4f4de9dde14a6fe17e9b3d6e059a4baf..f50edadfdd86b0f9fbc680d00c70a017970f3d34 100644 (file)
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -415,11 +415,11 @@ static struct css_set *find_css_set(
 
        /* First see if we already have a cgroup group that matches
         * the desired set */
-       write_lock(&css_set_lock);
+       read_lock(&css_set_lock);
        res = find_existing_css_set(oldcg, cgrp, template);
        if (res)
                get_css_set(res);
-       write_unlock(&css_set_lock);
+       read_unlock(&css_set_lock);
 
        if (res)
                return res;