releases/4.9.40/perf-intel-pt-fix-missing-stack-clear.patch

   1 From 12b7080609097753fd8198cc1daf589be3ec1cca Mon Sep 17 00:00:00 2001
   2 From: Adrian Hunter <adrian.hunter@intel.com>
   3 Date: Fri, 26 May 2017 11:17:04 +0300
   4 Subject: perf intel-pt: Fix missing stack clear
   5
   6 From: Adrian Hunter <adrian.hunter@intel.com>
   7
   8 commit 12b7080609097753fd8198cc1daf589be3ec1cca upstream.
   9
  10 The return compression stack must be cleared whenever there is a PSB. Fix
  11 one case where that was not happening.
  12
  13 Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
  14 Cc: Andi Kleen <ak@linux.intel.com>
  15 Link: http://lkml.kernel.org/r/1495786658-18063-4-git-send-email-adrian.hunter@intel.com
  16 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
  17 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  18
  19 ---
  20  tools/perf/util/intel-pt-decoder/intel-pt-decoder.c |    1 +
  21  1 file changed, 1 insertion(+)
  22
  23 --- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
  24 +++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
  25 @@ -1930,6 +1930,7 @@ static int intel_pt_walk_to_ip(struct in
  26                         break;
  27
  28                 case INTEL_PT_PSB:
  29 +                       intel_pt_clear_stack(&decoder->stack);
  30                         err = intel_pt_walk_psb(decoder);
  31                         if (err)
  32                                 return err;