linux-kernel - [PATCH 27/36] perf,rcu: convert call_rcu(swevent_hlist_release_rcu) to kfree

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Date:	Fri, 18 Mar 2011 12:08:29 +0800
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>, Ingo Molnar <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 27/36] 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@...fujitsu.com>
---
 kernel/perf_event.c |   10 +---------
 1 files changed, 1 insertions(+), 9 deletions(-)

diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index b0581bd..43b0410 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -5300,14 +5300,6 @@ 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);
@@ -5316,7 +5308,7 @@ 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)
-- 
1.7.4
--
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