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 #include <linux/jump_label.h> 5 6 DECLARE_STATIC_KEY_FALSE(uaccess_flush_key); 7 8 /* Prototype for function defined in exceptions-64s.S */ 9 void do_uaccess_flush(void); 10 allow_user_access(void __user * to,const void __user * from,unsigned long size)11static __always_inline void allow_user_access(void __user *to, const void __user *from, 12 unsigned long size) 13 { 14 } 15 prevent_user_access(void __user * to,const void __user * from,unsigned long size)16static inline void prevent_user_access(void __user *to, const void __user *from, 17 unsigned long size) 18 { 19 if (static_branch_unlikely(&uaccess_flush_key)) 20 do_uaccess_flush(); 21 } 22 23 #endif /* _ASM_POWERPC_BOOK3S_64_KUP_RADIX_H */ 24