From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Date: Mon, 25 Jan 2010 10:57:25 +0000 (+0100)
Subject: perf_event: x86: Optimize x86_pmu_disable()
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=6c9687abeb24d5b7aae7db5be070c2139ad29e29;p=linux-beck.git

perf_event: x86: Optimize x86_pmu_disable()

x86_pmu_disable() removes the event from the cpuc->event_list[], however
since an event can only be on that list once, stop looking after we found
it.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index 33c889ff21ae..66de282ad2fb 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -1884,6 +1884,7 @@ static void x86_pmu_disable(struct perf_event *event)
 				cpuc->event_list[i-1] = cpuc->event_list[i];
 
 			--cpuc->n_events;
+			break;
 		}
 	}
 	perf_event_update_userpage(event);