1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_POWERPC_BOOK3S_64_KUP_RADIX_H 3 #define _ASM_POWERPC_BOOK3S_64_KUP_RADIX_H 4 5 DECLARE_STATIC_KEY_FALSE(uaccess_flush_key); 6 7 /* Prototype for function defined in exceptions-64s.S */ 8 void do_uaccess_flush(void); 9 allow_user_access(void __user * to,const void __user * from,unsigned long size)10static __always_inline void allow_user_access(void __user *to, const void __user *from, 11 unsigned long size) 12 { 13 } 14 prevent_user_access(void __user * to,const void __user * from,unsigned long size)15static inline void prevent_user_access(void __user *to, const void __user *from, 16 unsigned long size) 17 { 18 if (static_branch_unlikely(&uaccess_flush_key)) 19 do_uaccess_flush(); 20 } 21 22 #endif /* _ASM_POWERPC_BOOK3S_64_KUP_RADIX_H */ 23