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Subject[PATCH 26/36] perf,rcu: convert call_rcu(free_ctx) to kfree_rcu()


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>
---
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 ed253aa..b0581bd 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -584,14 +584,6 @@ 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)) {
@@ -599,7 +591,7 @@ 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);
}
}

--
1.7.4

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