kernel: fix oprofile performance counter interrupt handling on mips

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@46482 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/ar71xx/patches-4.1/509-MIPS-ath79-process-board-kernel-option.patch

 --- a/arch/mips/ath79/setup.c
 +++ b/arch/mips/ath79/setup.c
-@@ -235,6 +235,8 @@ void __init plat_time_init(void)
+@@ -236,6 +236,8 @@ void __init plat_time_init(void)
  	mips_hpt_frequency = cpu_clk_rate / 2;
  }
  

target/linux/generic/patches-4.1/131-MIPS-export-get_c0_perfcount_int.patch

+From: Felix Fietkau <nbd@openwrt.org>
+Date: Thu, 23 Jul 2015 18:54:49 +0200
+Subject: [PATCH] MIPS: export get_c0_perfcount_int()
+
+get_c0_perfcount_int is tested from oprofile code. If oprofile is
+compiled as module, get_c0_perfcount_int needs to be exported, otherwise
+it cannot be resolved.
+
+Fixes: a669efc4a3b4 ("MIPS: Add hook to get C0 performance counter interrupt")
+Cc: stable@vger.kernel.org # v3.19+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+---
+
+--- a/arch/mips/ath79/setup.c
++++ b/arch/mips/ath79/setup.c
+@@ -186,6 +186,7 @@ int get_c0_perfcount_int(void)
+ {
+ 	return ATH79_MISC_IRQ(5);
+ }
++EXPORT_SYMBOL_GPL(get_c0_perfcount_int);
+ 
+ unsigned int get_c0_compare_int(void)
+ {
+--- a/arch/mips/lantiq/irq.c
++++ b/arch/mips/lantiq/irq.c
+@@ -466,6 +466,7 @@ int get_c0_perfcount_int(void)
+ {
+ 	return ltq_perfcount_irq;
+ }
++EXPORT_SYMBOL_GPL(get_c0_perfcount_int);
+ 
+ unsigned int get_c0_compare_int(void)
+ {
+--- a/arch/mips/mti-malta/malta-time.c
++++ b/arch/mips/mti-malta/malta-time.c
+@@ -148,6 +148,7 @@ int get_c0_perfcount_int(void)
+ 
+ 	return mips_cpu_perf_irq;
+ }
++EXPORT_SYMBOL_GPL(get_c0_perfcount_int);
+ 
+ unsigned int get_c0_compare_int(void)
+ {
+--- a/arch/mips/mti-sead3/sead3-time.c
++++ b/arch/mips/mti-sead3/sead3-time.c
+@@ -77,6 +77,7 @@ int get_c0_perfcount_int(void)
+ 		return MIPS_CPU_IRQ_BASE + cp0_perfcount_irq;
+ 	return -1;
+ }
++EXPORT_SYMBOL_GPL(get_c0_perfcount_int);
+ 
+ unsigned int get_c0_compare_int(void)
+ {
+--- a/arch/mips/pistachio/time.c
++++ b/arch/mips/pistachio/time.c
+@@ -26,6 +26,7 @@ int get_c0_perfcount_int(void)
+ {
+ 	return gic_get_c0_perfcount_int();
+ }
++EXPORT_SYMBOL_GPL(get_c0_perfcount_int);
+ 
+ void __init plat_time_init(void)
+ {
+--- a/arch/mips/ralink/irq.c
++++ b/arch/mips/ralink/irq.c
+@@ -89,6 +89,7 @@ int get_c0_perfcount_int(void)
+ {
+ 	return rt_perfcount_irq;
+ }
++EXPORT_SYMBOL_GPL(get_c0_perfcount_int);
+ 
+ unsigned int get_c0_compare_int(void)
+ {