57 lines
1.6 KiB
Diff
57 lines
1.6 KiB
Diff
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From 88bb1794592e3fe9c8d65ce73ee851e11dbbd26b Mon Sep 17 00:00:00 2001
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From: John Crispin <blogic@openwrt.org>
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Date: Wed, 24 Aug 2011 13:24:11 +0200
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Subject: [PATCH 09/24] MIPS: make oprofile use cp0_perfcount_irq if it is set
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The patch makes the oprofile code use the performance counters irq.
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This patch is written by Felix Fietkau.
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Signed-off-by: Felix Fietkau <nbd@openwrt.org>
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Signed-off-by: John Crispin <blogic@openwrt.org>
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Cc: linux-mips@linux-mips.org
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---
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arch/mips/oprofile/op_model_mipsxx.c | 12 ++++++++++++
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1 files changed, 12 insertions(+), 0 deletions(-)
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diff --git a/arch/mips/oprofile/op_model_mipsxx.c b/arch/mips/oprofile/op_model_mipsxx.c
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index 54759f1..86cf234 100644
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--- a/arch/mips/oprofile/op_model_mipsxx.c
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+++ b/arch/mips/oprofile/op_model_mipsxx.c
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@@ -298,6 +298,11 @@ static void reset_counters(void *arg)
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}
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}
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+static irqreturn_t mipsxx_perfcount_int(int irq, void *dev_id)
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+{
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+ return mipsxx_perfcount_handler();
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+}
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+
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static int __init mipsxx_init(void)
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{
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int counters;
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@@ -374,6 +379,10 @@ static int __init mipsxx_init(void)
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save_perf_irq = perf_irq;
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perf_irq = mipsxx_perfcount_handler;
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+ if (cp0_perfcount_irq >= 0)
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+ return request_irq(cp0_perfcount_irq, mipsxx_perfcount_int,
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+ IRQF_SHARED, "Perfcounter", save_perf_irq);
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+
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return 0;
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}
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@@ -381,6 +390,9 @@ static void mipsxx_exit(void)
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{
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int counters = op_model_mipsxx_ops.num_counters;
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+ if (cp0_perfcount_irq >= 0)
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+ free_irq(cp0_perfcount_irq, save_perf_irq);
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+
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counters = counters_per_cpu_to_total(counters);
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on_each_cpu(reset_counters, (void *)(long)counters, 1);
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--
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1.7.5.4
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