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cgroup,rcu: convert call_rcu(__free_css_id_cb) to kfree_rcu() 

The rcu callback __free_css_id_cb() just calls a kfree(),
so we use kfree_rcu() instead of the call_rcu(__free_css_id_cb).

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>
This commit is contained in:
Lai Jiangshan 2011-03-15 17:56:10 +08:00 committed by Paul E. McKenney
parent f2da1c40dc
commit 025cea99db
1 changed files with 1 additions and 9 deletions
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10
kernel/cgroup.c
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@ -4610,14 +4610,6 @@ bool css_is_ancestor(struct cgroup_subsys_state *child,
return ret;
}
static void __free_css_id_cb(struct rcu_head *head)
{
struct css_id *id;
id = container_of(head, struct css_id, rcu_head);
kfree(id);
}
void free_css_id(struct cgroup_subsys *ss, struct cgroup_subsys_state *css)
{
struct css_id *id = css->id;
@ -4632,7 +4624,7 @@ void free_css_id(struct cgroup_subsys *ss, struct cgroup_subsys_state *css)
spin_lock(&ss->id_lock);
idr_remove(&ss->idr, id->id);
spin_unlock(&ss->id_lock);
call_rcu(&id->rcu_head, __free_css_id_cb);
kfree_rcu(id, rcu_head);
}
EXPORT_SYMBOL_GPL(free_css_id);