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From 88bb1794592e3fe9c8d65ce73ee851e11dbbd26b Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Wed, 24 Aug 2011 13:24:11 +0200
Subject: [PATCH 09/24] MIPS: make oprofile use cp0_perfcount_irq if it is set
The patch makes the oprofile code use the performance counters irq.
This patch is written by Felix Fietkau.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John Crispin <blogic@openwrt.org>
Cc: linux-mips@linux-mips.org
---
arch/mips/oprofile/op_model_mipsxx.c | 12 ++++++++++++
1 files changed, 12 insertions(+), 0 deletions(-)
--- a/arch/mips/oprofile/op_model_mipsxx.c
+++ b/arch/mips/oprofile/op_model_mipsxx.c
@@ -303,6 +303,11 @@ static irqreturn_t mipsxx_perfcount_int(
return mipsxx_perfcount_handler();
}
+static irqreturn_t mipsxx_perfcount_int(int irq, void *dev_id)
+{
+ return mipsxx_perfcount_handler();
+}
+
static int __init mipsxx_init(void)
{
int counters;
@@ -383,6 +388,10 @@ static int __init mipsxx_init(void)
return request_irq(cp0_perfcount_irq, mipsxx_perfcount_int,
IRQF_SHARED, "Perfcounter", save_perf_irq);
+ if (cp0_perfcount_irq >= 0)
+ return request_irq(cp0_perfcount_irq, mipsxx_perfcount_int,
+ IRQF_SHARED, "Perfcounter", save_perf_irq);
+
return 0;
}
@@ -392,6 +401,9 @@ static void mipsxx_exit(void)
if (cp0_perfcount_irq >= 0)
free_irq(cp0_perfcount_irq, save_perf_irq);
+
+ if (cp0_perfcount_irq >= 0)
+ free_irq(cp0_perfcount_irq, save_perf_irq);
counters = counters_per_cpu_to_total(counters);
on_each_cpu(reset_counters, (void *)(long)counters, 1);
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