Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git...

Pull perf/core improvements and refactorings from Arnaldo Carvalho de Melo:

Infrastructure changes:

  - Reference count the cpu_map and thread_map classes. (Jiri Olsa)

  - Set evsel->{cpus,threads} from the evlist, if not set,
    allowing the generalization of some 'perf stat' functions that
    previously were accessing private static evlist variable. (Jiri Olsa)

  - Delete an unnecessary check before the calling
    free_event_desc() (Markus Elfring)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>