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    Subject[RFC GIT PULL] hw-breakpoints: Rewrite on top of perf counters
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    Hi,

    This is a rewrite of the hardware breakpoints on top of perf counters.

    Most of the details can be found in the 3rd and 4th patches.

    To sum-up, this brings the perf tunable features that a perf
    counter can perform:

    - Hardware registers scheduling through a pmu
    - Pinned/flexible, exlusive/non-exclusive, tunable periodic
    events.
    - Easier arch integration
    - Optimized register allocation

    There is still some work to do.
    Beside the todo list found in individual patches:

    - Fix a nasty bug: it doesn't properly free/unregister the breakpoint
    after a use through ptrace. I should fix it soon.

    - Drop the struct hw_breakpoint type and integrate the breakpoint core
    fields into the counter structure (into the perf attributes)

    Thanks,
    Frederic.

    ---
    The following changes since commit d6a65dffb30d8636b1e5d4c201564ef401a246cf:
    Frederic Weisbecker (1):
    tracing: Fix ring-buffer and ksym tracer merge interaction

    are available in the git repository at:

    git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing.git
    tracing/hw-breakpoints

    Frederic Weisbecker (4):
    perf_counter: Add open/close pmu callbacks
    perf_counter: Export various perf helpers for external users
    hw-breakpoints: Rewrite the hw-breakpoints layer on top of perf counters
    hw-breakpoints: Arbitrate access to pmu following registers constraints

    Li Zefan (1):
    ksym_tracer: Remove KSYM_SELFTEST_ENTRY

    arch/Kconfig | 3 +
    arch/x86/include/asm/debugreg.h | 7 -
    arch/x86/include/asm/hw_breakpoint.h | 31 ++-
    arch/x86/include/asm/processor.h | 10 +-
    arch/x86/kernel/hw_breakpoint.c | 217 ++++++++------
    arch/x86/kernel/process.c | 4 +-
    arch/x86/kernel/process_32.c | 28 +--
    arch/x86/kernel/process_64.c | 28 +--
    arch/x86/kernel/ptrace.c | 163 +++++++----
    arch/x86/kernel/smpboot.c | 3 -
    arch/x86/power/cpu.c | 6 -
    include/asm-generic/hw_breakpoint.h | 20 +-
    include/linux/perf_counter.h | 42 +++
    kernel/hw_breakpoint.c | 543 ++++++++++++++++++++--------------
    kernel/perf_counter.c | 112 +++++--
    kernel/trace/trace.h | 1 -
    kernel/trace/trace_ksym.c | 151 +++++++---
    kernel/trace/trace_selftest.c | 2 +-
    18 files changed, 840 insertions(+), 531 deletions(-)


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