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tracing: Fix sparse RCU warning

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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>
This commit is contained in:
Steven Rostedt (Red Hat) 2015-10-26 03:45:22 -04:00 committed by Steven Rostedt
parent 8ca532ad2b
commit fb66228828
1 changed files with 2 additions and 0 deletions
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2
kernel/trace/trace_events.c
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@ -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);