ftrace: selftest protect againt max flip

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There is a slight race condition in the selftest where the max update
of the wakeup and irqs/preemption off tests can be doing a max update as
the buffers are being tested. If this happens the system can crash with
a GPF.

This patch adds the max update spinlock around the checking of the
buffers to prevent such a race.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

...

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Steven Rostedt 2008-05-12 21:20:56 +02:00 • committed by Thomas Gleixner

parent d15f57f23e

commit 30afdcb1de

1 changed files with 7 additions and 3 deletions

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kernel/trace/trace_selftest.c

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