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

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

User visible changes:

  - Fix segfault using 'perf script --show-mmap-events', affects
    only current perf/core. (Adrian Hunter)

  - /proc/kcore requires CAP_SYS_RAWIO message too noisy, make it
    debug only. (Adrian Hunter)

  - Fix Intel PT timestamp handling. (Adrian Hunter)

  - Add Intel BTS support, with a call-graph script to show it and
    PT in use in a GUI using 'perf script' python scripting with
    postgresql and Qt. (Adrian Hunter)

  - Add checks for returned EVENT_ERROR type in libtraceevent, fixing
    a bug that surfaced on arm64 systems. (Dean Nelson)

  - Fallback to using kallsyms when libdw fails to handle a vmlinux file,
    that can happen, for instance, when perf is statically linked and
    then libdw fails to load libebl_{arch}.so. (Wang Nan)

Infrastructure changes:

  - Initialize reference counts in map__clone(). (Arnaldo Carvalho de Melo)

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

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