-From bc3a07e6c5149a82a22239a43e9f98514c2010d9 Mon Sep 17 00:00:00 2001
-From: John Crispin <blogic@openwrt.org>
-Date: Wed, 24 Aug 2011 13:24:11 +0200
-Subject: [PATCH 17/70] 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>
----
- arch/mips/oprofile/op_model_mipsxx.c | 12 ++++++++++++
- 1 files changed, 12 insertions(+), 0 deletions(-)
-
-diff --git a/arch/mips/oprofile/op_model_mipsxx.c b/arch/mips/oprofile/op_model_mipsxx.c
-index 54759f1..86cf234 100644
---- a/arch/mips/oprofile/op_model_mipsxx.c
-+++ b/arch/mips/oprofile/op_model_mipsxx.c
-@@ -298,6 +298,11 @@ static void reset_counters(void *arg)
- }
- }
-
-+static irqreturn_t mipsxx_perfcount_int(int irq, void *dev_id)
-+{
-+ return mipsxx_perfcount_handler();
-+}
-+
- static int __init mipsxx_init(void)
- {
- int counters;
-@@ -374,6 +379,10 @@ static int __init mipsxx_init(void)
- save_perf_irq = perf_irq;
- perf_irq = mipsxx_perfcount_handler;
-
-+ if (cp0_perfcount_irq >= 0)
-+ return request_irq(cp0_perfcount_irq, mipsxx_perfcount_int,
-+ IRQF_SHARED, "Perfcounter", save_perf_irq);
-+
- return 0;
- }
-
-@@ -381,6 +390,9 @@ static void mipsxx_exit(void)
- {
- int counters = op_model_mipsxx_ops.num_counters;
-
-+ 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);
-
---
-1.7.7.1
-
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