linux-kernel - [PATCH v2] kernel: events: add releases() annotation

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Message-Id: <20191216131415.23508-1-jbi.octave@gmail.com>
Date:   Mon, 16 Dec 2019 13:14:15 +0000
From:   Jules Irenge <jbi.octave@...il.com>
To:     bokun.feng@...il.com
Cc:     peterz@...radead.org, mingo@...hat.com, acme@...nel.org,
        mark.rutland@....com, alexander.shishkin@...ux.intel.com,
        jolsa@...hat.com, namhyung@...nel.org,
        linux-kernel@...r.kernel.org, Jules Irenge <jbi.octave@...il.com>
Subject: [PATCH v2] kernel: events: add releases() annotation

Add releases() annotation to remove issue detected by sparse tool.
warning: context imbalance in perf_output_end() - unexpected unlock

Signed-off-by: Jules Irenge <jbi.octave@...il.com>
---
Change
Added RCU as an argument in the releases() annotation

 kernel/events/ring_buffer.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/events/ring_buffer.c b/kernel/events/ring_buffer.c
index 7ffd5c763f93..3381e70fb0f5 100644
--- a/kernel/events/ring_buffer.c
+++ b/kernel/events/ring_buffer.c
@@ -295,6 +295,7 @@ unsigned int perf_output_skip(struct perf_output_handle *handle,
 }
 
 void perf_output_end(struct perf_output_handle *handle)
+	__releases(RCU)
 {
 	perf_output_put_handle(handle);
 	rcu_read_unlock();
-- 
2.23.0