| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _ASM_POWERPC_BOOK3S_64_KUP_RADIX_H |
| #define _ASM_POWERPC_BOOK3S_64_KUP_RADIX_H |
| #include <linux/jump_label.h> |
| |
| DECLARE_STATIC_KEY_FALSE(uaccess_flush_key); |
| |
| /* Prototype for function defined in exceptions-64s.S */ |
| void do_uaccess_flush(void); |
| |
| static __always_inline void allow_user_access(void __user *to, const void __user *from, |
| unsigned long size) |
| { |
| } |
| |
| static inline void prevent_user_access(void __user *to, const void __user *from, |
| unsigned long size) |
| { |
| if (static_branch_unlikely(&uaccess_flush_key)) |
| do_uaccess_flush(); |
| } |
| |
| #endif /* _ASM_POWERPC_BOOK3S_64_KUP_RADIX_H */ |
