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    SubjectRe: 2.6.37-rc1 build failure
    On Wed, 2010-11-03 at 21:34 -0700, Randy Dunlap wrote:
    > The build fails for me with the given .config file.
    > It's due to selects and depends, finally comes down to HAVE_PERF_EVENTS not being
    > enabled for M386 or M486. Do you actually have a processor of that vintage?

    FWIW this .config generates a _TON_ of Kconfig dep warnings..

    Urgh, Kconfig hell.

    config PERF_EVENTS
    bool "Kernel performance events and counters"
    default y if (PROFILING || PERF_COUNTERS)
    depends on HAVE_PERF_EVENTS
    select ANON_INODES
    select IRQ_WORK

    # grep PERF_EVENTS borken-build/.config

    So we managed to get PERF_EVENTS=y even though its dependency

    I bet that's because of:

    config X86
    select HAVE_PERF_EVENTS if (!M386 && !M486)
    select PERF_EVENTS

    Ingo, should we simply do something like the below patch?

    Subject: x86: Remove M[34]86 conditional on HAVE_PERF_EVENTS

    x86 requires PERF_EVENTS because of the hardware breakpoint mess,
    so don't make it conditional on M[34]86.

    Signed-off-by: Peter Zijlstra <>
    arch/x86/Kconfig | 2 +-
    1 files changed, 1 insertions(+), 1 deletions(-)

    diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
    index e832768..e330da2 100644
    --- a/arch/x86/Kconfig
    +++ b/arch/x86/Kconfig
    @@ -21,7 +21,7 @@ config X86
    select HAVE_IDE
    select HAVE_OPROFILE
    - select HAVE_PERF_EVENTS if (!M386 && !M486)
    + select HAVE_PERF_EVENTS
    select HAVE_IRQ_WORK
    select HAVE_KPROBES

     \ /
      Last update: 2010-11-10 14:01    [W:0.029 / U:108.856 seconds]
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