openwrtv3/target/linux/generic/patches-3.6/307-mips_oprofile_fix.patch

--- 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;
@@ -385,6 +390,10 @@ static int __init mipsxx_init(void)
 		return request_irq(cp0_perfcount_irq, mipsxx_perfcount_int,
 			0, "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;
 }
 
@@ -395,6 +404,9 @@ static void mipsxx_exit(void)
 	if ((cp0_perfcount_irq >= 0) && (cp0_compare_irq != cp0_perfcount_irq))
 		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);