[PATCH 0/2] perf/hw_breakpoint: Fix breakpoint modify

[Jiri Olsa]

hi,
Milind reported that modify_user_hw_breakpoint wouldn't
allow the breakpoint changing if the new attr had 'disabled'
set to true.

I found a case where it actualy prevents ptrace user interface
to change the breakpoint. It's described in patch 1 as perf test,
patch 2 is the breakpoint code fix.

I ran strace tests, nothing (new) broken there..

thanks,
jirka


---
Jiri Olsa (2):
      perf tests: Add breakpoint modify test
      perf/hw_breakpoint: Modify breakpoint even if the new attr has disabled set

 kernel/events/hw_breakpoint.c            |  10 ++++++----
 tools/perf/arch/x86/include/arch-tests.h |   1 +
 tools/perf/arch/x86/tests/Build          |   1 +
 tools/perf/arch/x86/tests/arch-tests.c   |   6 ++++++
 tools/perf/arch/x86/tests/bp-modify.c    | 119 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 133 insertions(+), 4 deletions(-)
 create mode 100644 tools/perf/arch/x86/tests/bp-modify.c