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Jann Horn reported crash in perf ftrace because evlist::all_cpus isn't
initialized if there's evlist without events, which is the case for perf
ftrace.
Adding initial initialization of evlist::all_cpus from given cpus,
regardless of events in the evlist.
Fixes: 7736627b865d ("perf stat: Use affinity for closing file descriptors")
Reported-by: Jann Horn <jannh@google.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Andi Kleen <ak@linux.intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200110151537.153012-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
cb71f7d43e