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Previously, the decoder would indicate begin / end by a branch from / to zero. That hides useful information, in particular when a trace ends with a call. To prepare for remedying that, add Intel PT decoder flags for trace begin / end and map them to the existing sample flags. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/20180920130048.31432-6-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>