1 files changed, 56 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-3.0/0009-MIPS-make-oprofile-use-cp0_perfcount_irq-if-it-is-se.patch b/target/linux/lantiq/patches-3.0/0009-MIPS-make-oprofile-use-cp0_perfcount_irq-if-it-is-se.patch
new file mode 100644
index 0000000000..ed35805046
--- /dev/null
+++ b/target/linux/lantiq/patches-3.0/0009-MIPS-make-oprofile-use-cp0_perfcount_irq-if-it-is-se.patch
@@ -0,0 +1,56 @@
+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(-)
+
+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);
+ 
+-- 
+1.7.5.4
+