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