[PATCH tip/core/rcu 65/86] perf,rcu: convert call_rcu(free_ctx) to kfree_rcu()

Paul E. McKenney
2011-05-01T13:29:59Z

From: Lai Jiangshan <laijs@cn.fujitsu.com>

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

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 27960f1..865c6f7 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -585,14 +585,6 @@ static void get_ctx(struct perf_event_context *ctx)
WARN_ON(!atomic_inc_not_zero(&ctx->refcount));
}

-static void free_ctx(struct rcu_head *head)
-{
- struct perf_event_context *ctx;
-
- ctx = container_of(head, struct perf_event_context, rcu_head);
- kfree(ctx);
-}
-
static void put_ctx(struct perf_event_context *ctx)
{
if (atomic_dec_and_test(&ctx->refcount)) {
@@ -600,7 +592,7 @@ static void put_ctx(struct perf_event_context *ctx)
put_ctx(ctx->parent_ctx);
if (ctx->task)
put_task_struct(ctx->task);
- call_rcu(&ctx->rcu_head, free_ctx);
+ kfree_rcu(ctx, rcu_head);
}
}

--
1.7.3.2