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trace: fix logic to start/stop counting 

The logic in the tracing_start/stop code prevents the WARN_ON
from ever detecting if a start/stop pair was mismatched.

Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Steven Rostedt 2009-01-22 14:26:15 -05:00 committed by Ingo Molnar
parent 94523e818f
commit b06a830183
1 changed files with 6 additions and 7 deletions
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13
kernel/trace/trace.c
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@ -610,13 +610,12 @@ void tracing_start(void)
return; return;
spin_lock_irqsave(&tracing_start_lock, flags); spin_lock_irqsave(&tracing_start_lock, flags);
if (--trace_stop_count) if (--trace_stop_count) {
goto out; if (trace_stop_count < 0) {
/* Someone screwed up their debugging */
if (trace_stop_count < 0) { WARN_ON_ONCE(1);
/* Someone screwed up their debugging */ trace_stop_count = 0;
WARN_ON_ONCE(1); }
trace_stop_count = 0;
goto out; goto out;
} }