1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_VSYSCALL_H 3 #define _ASM_X86_VSYSCALL_H 4 5 #include <linux/seqlock.h> 6 #include <uapi/asm/vsyscall.h> 7 8 #ifdef CONFIG_X86_VSYSCALL_EMULATION 9 extern void map_vsyscall(void); 10 11 /* 12 * Called on instruction fetch fault in vsyscall page. 13 * Returns true if handled. 14 */ 15 extern bool emulate_vsyscall(struct pt_regs *regs, unsigned long address); 16 #else 17 static inline void map_vsyscall(void) {} 18 static inline bool emulate_vsyscall(struct pt_regs *regs, unsigned long address) 19 { 20 return false; 21 } 22 #endif 23 24 #endif /* _ASM_X86_VSYSCALL_H */ 25