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SubjectRe: [PATCH 27/36] perf,rcu: convert call_rcu(swevent_hlist_release_rcu) to kfree_rcu()
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On Fri, 2011-03-18 at 12:08 +0800, Lai Jiangshan wrote:
>
> 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>

> ---
> 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)



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