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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>
This commit is contained in:
Robert Richter 2009-04-29 12:47:00 +02:00 committed by Ingo Molnar
parent 829b42dd39
commit 4138960a92
1 changed files with 2 additions and 0 deletions
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2
arch/x86/kernel/cpu/perf_counter.c
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@ -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;