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

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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>
This commit is contained in:
Lai Jiangshan 2011-03-15 17:53:46 +08:00 committed by Paul E. McKenney
parent 1217ed1ba5
commit 30088ad815
1 changed files with 1 additions and 7 deletions
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8
kernel/cgroup.c
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@ -326,12 +326,6 @@ static struct hlist_head *css_set_hash(struct cgroup_subsys_state *css[])
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 @@ static void __put_css_set(struct css_set *cg, int taskexit)
}
write_unlock(&css_set_lock);
call_rcu(&cg->rcu_head, free_css_set_rcu);
kfree_rcu(cg, rcu_head);
}
/*