nds32: use asm-generic/mmu_context.h for no-op implementations

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Acked-by: Greentime Hu <green.hu@gmail.com>
Cc: Nick Hu <nickhu@andestech.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

arch/nds32/include/asm/mmu_context.h

@@ -9,6 +9,7 @@
 #include <asm/proc-fns.h>
 #include <asm-generic/mm_hooks.h>
 
+#define init_new_context init_new_context
 static inline int
 init_new_context(struct task_struct *tsk, struct mm_struct *mm)
 {
@@ -16,8 +17,6 @@ init_new_context(struct task_struct *tsk, struct mm_struct *mm)
 	return 0;
 }
 
-#define destroy_context(mm)	do { } while(0)
-
 #define CID_BITS	9
 extern spinlock_t cid_lock;
 extern unsigned int cpu_last_cid;
@@ -47,10 +46,6 @@ static inline void check_context(struct mm_struct *mm)
 		__new_context(mm);
 }
 
-static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
-{
-}
-
 static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
 			     struct task_struct *tsk)
 {
@@ -62,7 +57,6 @@ static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
 	}
 }
 
-#define deactivate_mm(tsk,mm)	do { } while (0)
-#define activate_mm(prev,next)	switch_mm(prev, next, NULL)
+#include <asm-generic/mmu_context.h>
 
 #endif