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Commit fb662288 authored by Steven Rostedt (Red Hat)'s avatar Steven Rostedt (Red Hat) Committed by Steven Rostedt
Browse files

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: default avatarkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent 8ca532ad

kernel/trace/trace_events.c

+2 −0
Original line number Original line Diff line number Diff line
@@ -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)

static void *p_start(struct seq_file *m, loff_t *pos)

	__acquires(RCU)

{

{

	struct trace_pid_list *pid_list;

	struct trace_pid_list *pid_list;

	struct trace_array *tr = m->private;

	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)

static void p_stop(struct seq_file *m, void *p)

	__releases(RCU)

{

{

	rcu_read_unlock_sched();

	rcu_read_unlock_sched();

	mutex_unlock(&event_mutex);

	mutex_unlock(&event_mutex);