linux-kernel - [PATCH 4/9] tsc, x86: use new perfctr reservation functions in tsc code

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Date:	Thu, 4 Mar 2010 16:22:06 +0100
From:	Robert Richter <robert.richter@....com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>,
	oprofile-list <oprofile-list@...ts.sourceforge.net>,
	Robert Richter <robert.richter@....com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH 4/9] tsc, x86: use new perfctr reservation functions in tsc code

Use reserve_perfctr()/release_perfctr() in tsc code.

Cc: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Robert Richter <robert.richter@....com>
---
 arch/x86/kernel/tsc.c |    6 ++----
 1 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index ff98ef2..2cdacae 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -871,7 +871,7 @@ static unsigned long __init calibrate_cpu(void)
 	unsigned long flags;
 
 	for (i = 0; i < 4; i++)
-		if (avail_to_resrv_perfctr_nmi_bit(i))
+		if (reserve_perfctr(i))
 			break;
 	no_ctr_free = (i == 4);
 	if (no_ctr_free) {
@@ -881,8 +881,6 @@ static unsigned long __init calibrate_cpu(void)
 		rdmsrl(MSR_K7_EVNTSEL3, evntsel3);
 		wrmsrl(MSR_K7_EVNTSEL3, 0);
 		rdmsrl(MSR_K7_PERFCTR3, pmc3);
-	} else {
-		reserve_perfctr_nmi(MSR_K7_PERFCTR0 + i);
 	}
 	local_irq_save(flags);
 	/* start measuring cycles, incrementing from 0 */
@@ -900,7 +898,7 @@ static unsigned long __init calibrate_cpu(void)
 		wrmsrl(MSR_K7_PERFCTR3, pmc3);
 		wrmsrl(MSR_K7_EVNTSEL3, evntsel3);
 	} else {
-		release_perfctr_nmi(MSR_K7_PERFCTR0 + i);
+		release_perfctr(i);
 	}
 
 	return pmc_now * tsc_khz / (tsc_now - tsc_start);
-- 
1.7.0


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