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

Small fixes, also includes an important fix from Stephane for system
wide monitoring, problem introduced recently in perf/core, in the pid
list patches.

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