perf,rcu: convert call_rcu(free_ctx) to kfree_rcu() (cb796ff3) · Commits · 戴 / test

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

kernel/perf_event.c

+1 −9

Original line number	Diff line number	Diff line
		@@ -586,14 +586,6 @@ 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)) {
		@@ -601,7 +593,7 @@ 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);
		}
		}