diff --git a/arch/powerpc/include/asm/mmu_context.h b/arch/powerpc/include/asm/mmu_context.h
index d5821834dba9..652ce85f9410 100644
--- a/arch/powerpc/include/asm/mmu_context.h
+++ b/arch/powerpc/include/asm/mmu_context.h
@@ -282,9 +282,6 @@ static inline bool arch_vma_access_permitted(struct vm_area_struct *vma,
 }
 
 #define pkey_mm_init(mm)
-#define thread_pkey_regs_save(thread)
-#define thread_pkey_regs_restore(new_thread, old_thread)
-#define thread_pkey_regs_init(thread)
 #define arch_dup_pkeys(oldmm, mm)
 
 static inline u64 pte_to_hpte_pkey_bits(u64 pteflags, unsigned long flags)
diff --git a/arch/powerpc/include/asm/pkeys.h b/arch/powerpc/include/asm/pkeys.h
index a7951049e129..59a2c7dbc78f 100644
--- a/arch/powerpc/include/asm/pkeys.h
+++ b/arch/powerpc/include/asm/pkeys.h
@@ -169,10 +169,4 @@ static inline bool arch_pkeys_enabled(void)
 }
 
 extern void pkey_mm_init(struct mm_struct *mm);
-extern bool arch_supports_pkeys(int cap);
-extern unsigned int arch_usable_pkeys(void);
-extern void thread_pkey_regs_save(struct thread_struct *thread);
-extern void thread_pkey_regs_restore(struct thread_struct *new_thread,
-				     struct thread_struct *old_thread);
-extern void thread_pkey_regs_init(struct thread_struct *thread);
 #endif /*_ASM_POWERPC_KEYS_H */