1 files changed, 51 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches/0009-MIPS-make-oprofile-use-cp0_perfcount_irq-if-it-is-se.patch b/target/linux/lantiq/patches/0009-MIPS-make-oprofile-use-cp0_perfcount_irq-if-it-is-se.patch
new file mode 100644
index 0000000000..1d42341b3b
--- /dev/null
+++ b/target/linux/lantiq/patches/0009-MIPS-make-oprofile-use-cp0_perfcount_irq-if-it-is-se.patch
@@ -0,0 +1,51 @@
+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);