[tip:perfcounters/core] perf_counter, x86: add default path to cpu detection

[tip-bot for Robert Richter]

Commit-ID:  4138960a9251a265002b5cf07e671a49f8495381
Gitweb:     http://git.kernel.org/tip/4138960a9251a265002b5cf07e671a49f8495381
Author:     Robert Richter <robert.richter@xxxxxxx>
AuthorDate: Wed, 29 Apr 2009 12:47:00 +0200
Committer:  Ingo Molnar <mingo@xxxxxxx>
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@xxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Acked-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
LKML-Reference: <1241002046-8832-4-git-send-email-robert.richter@xxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>


---
 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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