Merge tag 'perf-core-for-mingo-5.3-20190715' of git://git.kernel.org/pub/scm/linux...

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

 perf db-export:
  Adrian Hunter:
  - Improvements in how COMM details are exported to databases for
    post processing and use in the sql-viewer.py UI.

  - Export switch events to the database.

 BPF:
  Arnaldo Carvalho de Melo:
  - Bump rlimit(MEMLOCK) for 'perf test bpf' and 'perf trace', just like
    selftests/bpf/bpf_rlimit.h do, which makes errors due to exhaustion of
    this limit, which are kinda cryptic (EPERM sometimes) less frequent.

 perf version:
  Ravi Bangoria:
  - Fix segfault due to missing OPT_END(), noticed on PowerPC.

 perf vendor events:
  Thomas Richter:
  - Add JSON files for IBM s/390 machine type 8561.

 perf cs-etm (ARM):
  YueHaibing:
  - Fix two cases of error returns not bing done properly: Invalid ERR_PTR() use
    and loss of propagation error codes.