tree 12dd840eef0475e81e0dc8f616229a030d7caae4
parent 9dfc3bc7d21864d47797d64b8d531d4dbbc0b618
author Frederic Weisbecker <fweisbec@gmail.com> 1229461738 +0100
committer Ingo Molnar <mingo@elte.hu> 1229469995 +0100

tracing/ftrace: use preempt_enable_no_resched_notrace in ring_buffer_time_stamp()

Impact: prevent a trace recursion

After some tests with function graph tracer under x86-32, I saw some recursions
caused by ring_buffer_time_stamp() that calls preempt_enable_no_notrace() which
calls preempt_schedule() which is traced itself.

This patch re-enables preemption without rescheduling.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>