ftrace: prevent recursion

Impact: prevent unnecessary stack recursion

if the resched flag was set before we entered, then don't reschedule.

Signed-off-by: Lai Jiangshan <[e-mail]>
Acked-by: Steven Rostedt <[e-mail]>
Signed-off-by: Ingo Molnar <[e-mail]>

kernel/trace/ring_buffer.c

···
 
  out:
 	if (resched)
-		preempt_enable_notrace();
+		preempt_enable_no_resched_notrace();
 	else
 		preempt_enable_notrace();
 	return NULL;