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>

diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c
index 7d0f81dcb524786f827fdcb03af03158264d6d45..d6d6529349ddd4e9eedc8fcd1441bd9a90ede506 100644 (file)
--- 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;