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

Pull perf/core improvements and fixes from Jiri Olsa:

  * Warn the user when trace command is not available (Arnaldo Carvalho de Melo)

  * Add warning when disabling perl scripting support due to missing devel files (Arnaldo Carvalho de Melo)

  * Consider header files outside perf directory in tags target (Sebastian Andrzej Siewior)

  * Allow overriding sysfs and proc finding with env var (Cody P Schafer)

  * Fix "==" into "=" in ui_browser__warning assignment (zhangdianfang)

  * Factor elide bool handling in sort code (Jiri Olsa)

  * Fix poll return value propagation (Jiri Olsa)

  * Fix 'make help' message error (Jianyu Zhan)

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>