arch/x86/include/asm/vsyscall.h

   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 */