Merge tag 'perf-core-for-mingo-20161207' 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:

Improvements:

 - Improve error message when analyzing file with required events in
   'perf sched timehist' (David Ahern)

Fixes:

 - Force fixdep compilation to be done at the start of the build, fixing
   some build race conditions in high core count machines (Jiri Olsa)

 - Fix handling a zero sample->tid in 'perf sched timehist', as
   sometimes that isn't the idle thread (Namhyung Kim)

Infrastructure changes:

 - Check minimal accepted LLVM version in its feature check, 3.9 at this
   time (Wang Nan)

Documentation changes:

 - Explicitly document that --children is enabled by default (Yannick Brosseau)

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

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