perf header: Use event_name() to get an event name
perf_evsel.name may be not initialized Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arun Sharma <asharma@fb.com> Cc: devel@openvz.org Link: http://lkml.kernel.org/r/1322471015-107825-2-git-send-email-avagin@openvz.orgSigned-off-by: NAndrew Vagin <avagin@openvz.org> Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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