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/

arch/mips/cavium-octeon/cpu.c

@@ -41,12 +41,8 @@ static int cnmips_cu2_call(struct notifier_block *nfb, unsigned long action,
 	return NOTIFY_OK;		/* Let default notifier send signals */
 }
 
-static struct notifier_block cnmips_cu2_notifier = {
-	.notifier_call = cnmips_cu2_call,
-};
-
 static int cnmips_cu2_setup(void)
 {
-	return register_cu2_notifier(&cnmips_cu2_notifier);
+	return cu2_notifier(cnmips_cu2_call, 0);
 }
 early_initcall(cnmips_cu2_setup);

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 */

arch/mips/kernel/traps.c

@@ -907,11 +907,6 @@ static int default_cu2_call(struct notifier_block *nfb, unsigned long action,
 	return NOTIFY_OK;
 }
 
-static struct notifier_block default_cu2_notifier = {
-	.notifier_call	= default_cu2_call,
-	.priority	= 0x80000000,		/* Run last  */
-};
-
 asmlinkage void do_cpu(struct pt_regs *regs)
 {
 	unsigned int __user *epc;
@@ -1734,5 +1729,5 @@ void __init trap_init(void)
 
 	sort_extable(__start___dbe_table, __stop___dbe_table);
 
-	register_cu2_notifier(&default_cu2_notifier);
+	cu2_notifier(default_cu2_call, 0x80000000);	/* Run last  */
 }