| /* SPDX-License-Identifier: GPL-2.0 */ | |
| #ifndef _ASM_X86_VSYSCALL_H | |
| #define _ASM_X86_VSYSCALL_H | |
| #include <linux/seqlock.h> | |
| #include <uapi/asm/vsyscall.h> | |
| #ifdef CONFIG_X86_VSYSCALL_EMULATION | |
| extern void map_vsyscall(void); | |
| extern void set_vsyscall_pgtable_user_bits(pgd_t *root); | |
| /* | |
| * Called on instruction fetch fault in vsyscall page. | |
| * Returns true if handled. | |
| */ | |
| extern bool emulate_vsyscall(struct pt_regs *regs, unsigned long address); | |
| #else | |
| static inline void map_vsyscall(void) {} | |
| static inline bool emulate_vsyscall(struct pt_regs *regs, unsigned long address) | |
| { | |
| return false; | |
| } | |
| #endif | |
| #endif /* _ASM_X86_VSYSCALL_H */ |