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    Subject[tip:perfcounters/core] perf_counter, x86: add default path to cpu detection
    Commit-ID:  4138960a9251a265002b5cf07e671a49f8495381
    Gitweb: http://git.kernel.org/tip/4138960a9251a265002b5cf07e671a49f8495381
    Author: Robert Richter <robert.richter@amd.com>
    AuthorDate: Wed, 29 Apr 2009 12:47:00 +0200
    Committer: Ingo Molnar <mingo@elte.hu>
    CommitDate: Wed, 29 Apr 2009 14:51:01 +0200

    perf_counter, x86: add default path to cpu detection

    This quits hw counter initialization immediately if no cpu is
    detected.

    [ Impact: cleanup ]

    Signed-off-by: Robert Richter <robert.richter@amd.com>
    Cc: Paul Mackerras <paulus@samba.org>
    Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
    LKML-Reference: <1241002046-8832-4-git-send-email-robert.richter@amd.com>
    Signed-off-by: Ingo Molnar <mingo@elte.hu>


    ---
    arch/x86/kernel/cpu/perf_counter.c | 2 ++
    1 files changed, 2 insertions(+), 0 deletions(-)

    diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c
    index 7d0f81d..d6d6529 100644
    --- a/arch/x86/kernel/cpu/perf_counter.c
    +++ b/arch/x86/kernel/cpu/perf_counter.c
    @@ -997,6 +997,8 @@ void __init init_hw_perf_counters(void)
    case X86_VENDOR_AMD:
    pmc_ops = pmc_amd_init();
    break;
    + default:
    + return;
    }
    if (!pmc_ops)
    return;

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