cgroup,rcu: convert call_rcu(free_css_set_rcu) to kfree_rcu()
The rcu callback free_css_set_rcu() just calls a kfree(),
so we use kfree_rcu() instead of the call_rcu(free_css_set_rcu).
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Paul Menage <menage@google.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 25c7eb5..d5160a8 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -326,12 +326,6 @@
return &css_set_table[index];
}
-static void free_css_set_rcu(struct rcu_head *obj)
-{
- struct css_set *cg = container_of(obj, struct css_set, rcu_head);
- kfree(cg);
-}
-
/* We don't maintain the lists running through each css_set to its
* task until after the first call to cgroup_iter_start(). This
* reduces the fork()/exit() overhead for people who have cgroups
@@ -375,7 +369,7 @@
}
write_unlock(&css_set_lock);
- call_rcu(&cg->rcu_head, free_css_set_rcu);
+ kfree_rcu(cg, rcu_head);
}
/*