linux-kernel - [PATCH -tip/master] x86,perf: p4_pmu_schedule_events -- use smp_processor

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Date:	Sun, 16 May 2010 01:45:52 +0400
From:	Cyrill Gorcunov <gorcunov@...nvz.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Lin Ming <ming.m.lin@...el.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH -tip/master] x86,perf: p4_pmu_schedule_events -- use
	smp_processor_id

This snippet somehow escaped the commit

 | commit 137351e0feeb9f25d99488ee1afc1c79f5499a9a
 | Author: Cyrill Gorcunov <gorcunov@...nvz.org>
 | Date:   Sat May 8 15:25:52 2010 +0400
 |
 |    x86, perf: P4 PMU -- protect sensible procedures from preemption

so make it eventually. In short -- it helps to catch preemption issue.

Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Lin Ming <ming.m.lin@...el.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@...nvz.org>
---
 arch/x86/kernel/cpu/perf_event_p4.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6.git/arch/x86/kernel/cpu/perf_event_p4.c
=====================================================================
--- linux-2.6.git.orig/arch/x86/kernel/cpu/perf_event_p4.c
+++ linux-2.6.git/arch/x86/kernel/cpu/perf_event_p4.c
@@ -762,7 +762,7 @@ static int p4_pmu_schedule_events(struct
 {
 	unsigned long used_mask[BITS_TO_LONGS(X86_PMC_IDX_MAX)];
 	unsigned long escr_mask[BITS_TO_LONGS(P4_ESCR_MSR_TABLE_SIZE)];
-	int cpu = raw_smp_processor_id();
+	int cpu = smp_processor_id();
 	struct hw_perf_event *hwc;
 	struct p4_event_bind *bind;
 	unsigned int i, thread, num;
--
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