linux-kernel - [PATCH 2.6.18-rt5 1/1] ARM: Use IRQF_NODELAY for XScale oprofile interrupt

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Message-Id: <20061009230146.234622000@mvista.com>
Date:	Mon, 09 Oct 2006 16:01:46 -0700
From:	Kevin Hilman <khilman@...sta.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 2.6.18-rt5 1/1] ARM: Use IRQF_NODELAY for XScale oprofile interrupt

Convert XScale performance monitor unit (PMU) interrupt used by
oprofile to IRQF_NODELAY.  PMU results not useful if ISR is run as
thread.

Signed-off-by: Kevin Hilman <khilman@...sta.com>

Index: dev/arch/arm/oprofile/op_model_xscale.c
===================================================================
--- dev.orig/arch/arm/oprofile/op_model_xscale.c
+++ dev/arch/arm/oprofile/op_model_xscale.c
@@ -383,8 +383,9 @@ static int xscale_pmu_start(void)
 {
 	int ret;
 	u32 pmnc = read_pmnc();
+	int irq_flags = IRQF_DISABLED | IRQF_NODELAY;
 
-	ret = request_irq(XSCALE_PMU_IRQ, xscale_pmu_interrupt, IRQF_DISABLED,
+	ret = request_irq(XSCALE_PMU_IRQ, xscale_pmu_interrupt, irq_flags,
 			"XScale PMU", (void *)results);
 
 	if (ret < 0) {
--
-
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