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Subject[PATCH tip/core/rcu 66/86] perf,rcu: convert call_rcu(swevent_hlist_release_rcu) to kfree_rcu()
Date
From: Lai Jiangshan <laijs@cn.fujitsu.com>

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>
---
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 865c6f7..6536a03 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -5311,14 +5311,6 @@ 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);
@@ -5327,7 +5319,7 @@ 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)
--
1.7.3.2


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