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 <laijs@cn.fujitsu.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

authored by Lai Jiangshan and committed by Ingo Molnar 4f5a7f40 fb91ee6c

+1 -1
+1 -1
kernel/trace/ring_buffer.c
··· 1215 1216 out: 1217 if (resched) 1218 - preempt_enable_notrace(); 1219 else 1220 preempt_enable_notrace(); 1221 return NULL;
··· 1215 1216 out: 1217 if (resched) 1218 + preempt_enable_no_resched_notrace(); 1219 else 1220 preempt_enable_notrace(); 1221 return NULL;