tracing/ftrace: use preempt_enable_no_resched_notrace in ring_buffer_time_stamp()

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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>

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Frederic Weisbecker 2008-12-16 22:08:58 +01:00 • committed by Ingo Molnar

parent 9dfc3bc7d2

commit 2c2d7329d8

1 changed files with 1 additions and 1 deletions

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kernel/trace/ring_buffer.c

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