linux-kernel - [tip:perf/core] perf: Fix perf_event_exit_cpu

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Date:	Fri, 17 Sep 2010 11:28:37 GMT
From:	tip-bot for Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, eranian@...gle.com, hpa@...or.com,
	mingo@...hat.com, robert.richter@....com, a.p.zijlstra@...llo.nl,
	tglx@...utronix.de, mingo@...e.hu
Subject: [tip:perf/core] perf: Fix perf_event_exit_cpu_context()

Commit-ID:  917bdd1c9b7b0f4c22f2504c2f0c1074c8ab9df7
Gitweb:     http://git.kernel.org/tip/917bdd1c9b7b0f4c22f2504c2f0c1074c8ab9df7
Author:     Peter Zijlstra <a.p.zijlstra@...llo.nl>
AuthorDate: Fri, 17 Sep 2010 11:28:49 +0200
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Fri, 17 Sep 2010 12:48:48 +0200

perf: Fix perf_event_exit_cpu_context()

Use the right cpu-context.. spotted by preempt warning on
hot-unplug

Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Stephane Eranian <eranian@...gle.com>
Cc: Robert Richter <robert.richter@....com>
LKML-Reference: <20100917093009.461794357@...llo.nl>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 kernel/perf_event.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 6d7eef5..27332e5 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -6269,14 +6269,13 @@ static void perf_event_exit_cpu_context(int cpu)
 
 	idx = srcu_read_lock(&pmus_srcu);
 	list_for_each_entry_rcu(pmu, &pmus, entry) {
-		ctx = &this_cpu_ptr(pmu->pmu_cpu_context)->ctx;
+		ctx = &per_cpu_ptr(pmu->pmu_cpu_context, cpu)->ctx;
 
 		mutex_lock(&ctx->mutex);
 		smp_call_function_single(cpu, __perf_event_exit_context, ctx, 1);
 		mutex_unlock(&ctx->mutex);
 	}
 	srcu_read_unlock(&pmus_srcu, idx);
-
 }
 
 static void perf_event_exit_cpu(int cpu)
--
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