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

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>

1 files changed, 1 insertions, 9 deletions

diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 17a176f7ef1..b90d660fc87 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -5323,14 +5323,6 @@ swevent_hlist_deref(struct swevent_htable *swhash)
                                          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)
 {
         struct swevent_hlist *hlist = swevent_hlist_deref(swhash);
@@ -5339,7 +5331,7 @@ static void swevent_hlist_release(struct swevent_htable *swhash)
                 return;
 
         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)