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perf,rcu: convert call_rcu(swevent_hlist_release_rcu) to kfree_rcu()

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

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
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 2011-03-18 12:08:29 +08:00 • committed by Paul E. McKenney
parent cb796ff338
commit fa4bbc4ca5
1 changed files with 1 additions and 9 deletions
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10
kernel/perf_event.c
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@ -5323,14 +5323,6 @@ swevent_hlist_deref(struct swevent_htable *swhash)
lockdep_is_held(&swhash->hlist_mutex)); lockdep_is_held(&swhash->hlist_mutex));
} }
static void swevent_hlist_release_rcu(struct rcu_head *rcu_head)
{
struct swevent_hlist *hlist;
hlist = container_of(rcu_head, struct swevent_hlist, rcu_head);
kfree(hlist);
}
static void swevent_hlist_release(struct swevent_htable *swhash) static void swevent_hlist_release(struct swevent_htable *swhash)
{ {
struct swevent_hlist *hlist = swevent_hlist_deref(swhash); struct swevent_hlist *hlist = swevent_hlist_deref(swhash);
@ -5339,7 +5331,7 @@ static void swevent_hlist_release(struct swevent_htable *swhash)
return; return;
rcu_assign_pointer(swhash->swevent_hlist, NULL); rcu_assign_pointer(swhash->swevent_hlist, NULL);
call_rcu(&hlist->rcu_head, swevent_hlist_release_rcu); kfree_rcu(hlist, rcu_head);
} }
static void swevent_hlist_put_cpu(struct perf_event *event, int cpu) static void swevent_hlist_put_cpu(struct perf_event *event, int cpu)