diff options
| author | Stephane Eranian <eranian@google.com> | 2010-05-17 06:46:01 -0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-05-18 12:35:47 -0400 |
| commit | 00d1d0b095ba4e5c0958cb228b2a9c445d4a339d (patch) | |
| tree | 68e96107d3297f97c232dac4a5548a8abb9bf42f /kernel/rcutree_trace.c | |
| parent | 4f41c013f553957765902fb01475972f0af3e8e7 (diff) | |
perf: Fix errors path in perf_output_begin()
In case the sampling buffer has no "payload" pages,
nr_pages is 0. The problem is that the error path in
perf_output_begin() skips to a label which assumes
perf_output_lock() has been issued which is not the
case. That triggers a WARN_ON() in
perf_output_unlock().
This patch fixes the problem by skipping
perf_output_unlock() in case data->nr_pages is 0.
Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <4bf13674.014fd80a.6c82.ffffb20c@mx.google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/rcutree_trace.c')
0 files changed, 0 insertions, 0 deletions