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authorSteven Rostedt (Red Hat) <rostedt@goodmis.org>2015-10-26 03:45:22 -0400
committerSteven Rostedt <rostedt@goodmis.org>2015-10-26 03:51:32 -0400
commitfb662288284e8f2ec26f13d50a6b0d5781771648 (patch)
treec048e8da54d35d7abafe5f661a37a2a59e9f0a3c /kernel/trace/trace_events.c
parent8ca532ad2b050da0d0db3544d9ab8b40675e4ca1 (diff)
downloadlinux-fb662288284e8f2ec26f13d50a6b0d5781771648.tar.bz2
tracing: Fix sparse RCU warning
p_start() and p_stop() are seq_file functions that match. Teach sparse to know that rcu_read_lock_sched() that is taken by p_start() is released by p_stop. Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace/trace_events.c')
-rw-r--r--kernel/trace/trace_events.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 2b7fccd499c6..fb0261e90acc 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -938,6 +938,7 @@ static void t_stop(struct seq_file *m, void *p)
}
static void *p_start(struct seq_file *m, loff_t *pos)
+ __acquires(RCU)
{
struct trace_pid_list *pid_list;
struct trace_array *tr = m->private;
@@ -960,6 +961,7 @@ static void *p_start(struct seq_file *m, loff_t *pos)
}
static void p_stop(struct seq_file *m, void *p)
+ __releases(RCU)
{
rcu_read_unlock_sched();
mutex_unlock(&event_mutex);