MIPS: Provide more elevant interface cu2_notifier for CP2 extensions.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Patchwork: https://patchwork.linux-mips.org/patch/1504/

1 files changed, 12 insertions, 0 deletions

diff --git a/arch/mips/include/asm/cop2.h b/arch/mips/include/asm/cop2.h
index 6b04c98b7fad..2cb2f0c2c4f8 100644
--- a/arch/mips/include/asm/cop2.h
+++ b/arch/mips/include/asm/cop2.h
@@ -9,6 +9,8 @@
 #ifndef __ASM_COP2_H
 #define __ASM_COP2_H
 
+#include <linux/notifier.h>
+
 enum cu2_ops {
         CU2_EXCEPTION,
         CU2_LWC2_OP,
@@ -20,4 +22,14 @@ enum cu2_ops {
 extern int register_cu2_notifier(struct notifier_block *nb);
 extern int cu2_notifier_call_chain(unsigned long val, void *v);
 
+#define cu2_notifier(fn, pri)                                           \
+({                                                                      \
+        static struct notifier_block fn##_nb __cpuinitdata = {          \
+                .notifier_call = fn,                                    \
+                .priority = pri                                         \
+        };                                                              \
+                                                                        \
+        register_cu2_notifier(&fn##_nb);                                \
+})
+
 #endif /* __ASM_COP2_H */