linux-kernel - [PATCH] perf/x86: Remove redundant calls to perf_pmu

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Date:	Wed, 18 Feb 2015 10:45:43 -0700
From:	David Ahern <dsahern@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	David Ahern <dsahern@...il.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH] perf/x86: Remove redundant calls to perf_pmu_{dis|en}able

perf_pmu_disable is called before pmu->add and perf_pmu_enable is called
afterwards. No need to call these inside of x86_pmu_add as well.

Signed-off-by: David Ahern <dsahern@...il.com>
Cc: Peter Zijlstra <peterz@...radead.org>
---
 arch/x86/kernel/cpu/perf_event.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index b71a7f86d68a..2d1675816bef 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -1033,7 +1033,6 @@ static int x86_pmu_add(struct perf_event *event, int flags)
 
 	hwc = &event->hw;
 
-	perf_pmu_disable(event->pmu);
 	n0 = cpuc->n_events;
 	ret = n = collect_events(cpuc, event, false);
 	if (ret < 0)
@@ -1071,7 +1070,6 @@ static int x86_pmu_add(struct perf_event *event, int flags)
 
 	ret = 0;
 out:
-	perf_pmu_enable(event->pmu);
 	return ret;
 }
 
-- 
1.9.3 (Apple Git-50)

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