perf/x86: Filter out undefined events from sysfs events attribute
The sysfs events group attribute currently shows all hw events, including also undefined ones. This patch filters out all undefined events out of the sysfs events group attribute, so they don't even show up. Suggested-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Jiri Olsa <jolsa@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1349873598-12583-3-git-send-email-jolsa@redhat.comSigned-off-by: Ingo Molnar <mingo@kernel.org>
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