perf: fix temporary file ownership check
A file in /tmp/ might be a symlink, so lstat() should be used instead of stat(). Acked-by: NPekka Enberg <penberg@kernel.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Pekka Enberg <penberg@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20110811205537.GA22864@albatrosSigned-off-by: NVasiliy Kulikov <segoon@openwall.com> Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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