arch/x86/vdso/vextern.h

   1 #ifndef VEXTERN
   2 #include <asm/vsyscall.h>
   3 #define VEXTERN(x) \
   4         extern typeof(x) *vdso_ ## x __attribute__((visibility("hidden")));
   5 #endif
   6
   7 #define VMAGIC 0xfeedbabeabcdefabUL
   8
   9 /* Any kernel variables used in the vDSO must be exported in the main
  10    kernel's vmlinux.lds.S/vsyscall.h/proper __section and
  11    put into vextern.h and be referenced as a pointer with vdso prefix.
  12    The main kernel later fills in the values.   */
  13
  14 VEXTERN(jiffies)
  15 VEXTERN(vgetcpu_mode)
  16 VEXTERN(vsyscall_gtod_data)