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

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

  * Honour -m option in 'trace', the tool was offering the option to
    set the mmap size, but wasn't using it when doing the actual mmap
    on the events file descriptors, fix from Jiri Olsa.

  * Correct the message in feature-libnuma checking, swowing the right
    devel package names for various distros, from Dongsheng Yang.

  * Polish 'readn' function and introduce its counterpart, 'writen', from
    Jiri Olsa.

  * Start moving timechart state from global variables to a 'perf_tool' derived
    'timechart' struct.

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