arm64: use asm-generic/mmu_context.h for no-op implementations

Signed-off-by: Nicholas Piggin <[e-mail]>
Acked-by: Catalin Marinas <[e-mail]>
Cc: Will Deacon <[e-mail]>
Cc: [e-mail]
Signed-off-by: Arnd Bergmann <[e-mail]>

arch/arm64/include/asm/mmu_context.h

···
  * Setting a reserved TTBR0 or EPD0 would work, but it all gets ugly when you
  * take CPU migration into account.
  */
-#define destroy_context(mm)		do { } while(0)
 void check_and_switch_context(struct mm_struct *mm);
 
+#define init_new_context(tsk, mm) init_new_context(tsk, mm)
 static inline int
 init_new_context(struct task_struct *tsk, struct mm_struct *mm)
 {
···
 }
 #endif
 
+#define enter_lazy_tlb enter_lazy_tlb
 static inline void
 enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
 {
···
 	update_saved_ttbr0(tsk, next);
 }
 
-#define deactivate_mm(tsk,mm)	do { } while (0)
-#define activate_mm(prev,next)	switch_mm(prev, next, current)
-
 void verify_cpu_asid_bits(void);
 void post_ttbr_update_workaround(void);
 
 unsigned long arm64_mm_context_get(struct mm_struct *mm);
 void arm64_mm_context_put(struct mm_struct *mm);
+
+#include <asm-generic/mmu_context.h>
 
 #endif /* !__ASSEMBLY__ */