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ring-buffer: change WARN_ON from checking preempt_count to preemptible

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There's a WARN_ON in the ring buffer code that makes sure preemption
is disabled. It checks "!preempt_count()". But when CONFIG_PREEMPT is not
enabled, preempt_count() is always zero, and this will trigger the warning.

[ Impact: prevent false warning on non preemptible kernels ]

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt 2009-05-07 19:58:55 -04:00 committed by Steven Rostedt
parent 7da3046d6c
commit 74f4fd2166
1 changed files with 1 additions and 1 deletions
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2
kernel/trace/ring_buffer.c
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@ -1688,7 +1688,7 @@ void ring_buffer_discard_commit(struct ring_buffer *buffer,
* committed yet. Thus we can assume that preemption
* is still disabled.
*/
RB_WARN_ON(buffer, !preempt_count());
RB_WARN_ON(buffer, preemptible());
cpu = smp_processor_id();
cpu_buffer = buffer->buffers[cpu];