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:

 - Rename the "colors.code" ~/.perfconfig variable to "colors.jump_arrows",
   as it controls just the that UI element in the annotate browser (Taeung Song)

 - Avoid trying to read ELF symtabs from device files, noticed while doing
   memory profiling work (Jiri Olsa)

 - Improve context detection when offering options in the hists browser,
   i.e.  some options don't make sense when the browser is not working with
   a perf.data file ('perf top' mode), only in 'perf report' mode, like
   scripting (Namhyung Kim)

Infrastructure changes:

 - Elliminate duplication in the hists browser filter functions, getting the
   common part into a function that receives callbacks for filtering by
   DSO, thread, etc. (Namhyung Kim)

 - Fix misleadingly indented assignment, found using
   gcc6 -Wmisleading-indentation (Markus Trippelsdorf)

 - Handle LLVM relocation oddities in libbpf, introducing a 'perf test' that
   detects such problems and then fixing the problem, so that the test now
   passes (Wang Nan)

 - More improvements to the build infrastructure to allow reusing the
   feature detection facilities (Wang Nan)

 - Auto initialize the globals needed by cpu__max_{cpu,node}() routines
   (Arnaldo Carvalho de Melo)

Documentation changes:

 - Document the perf sysctls in Documentation/sysctl/kernel.txt (Ben Hutchings)

 - Document a bunch more ~/.perfconfig knobs (Taeung Song)

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

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