Frederic Weisbecker 2c2d7329d8 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>

2008-12-17 00:26:35 +01:00

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