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perf: Don't call release_callchain_buffers() if allocation fails

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When alloc_callchain_buffers() fails, it frees all of
entries before return. In addition, calling the
release_callchain_buffers() will cause a NULL pointer
dereference since callchain_cpu_entries is not set.

Signed-off-by: Namhyung Kim <[email protected]>
Acked-by: Frederic Weisbecker <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Arnaldo Carvalho de Melo <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Namhyung Kim 2012-01-20 10:12:45 +09:00 • committed by Ingo Molnar
commit fd45c15f13
1 changed files with 0 additions and 2 deletions
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2
kernel/events/callchain.c
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@ -115,8 +115,6 @@ int get_callchain_buffers(void)
}
err = alloc_callchain_buffers();
if (err)
release_callchain_buffers();
exit:
mutex_unlock(&callchain_mutex);