include/sys/sysmacros.h

   1 #ifndef _SYS_SYSMACROS_H
   2 #define _SYS_SYSMACROS_H
   3
   4 #define major(x) \
   5         ((unsigned)( (((x)>>31>>1) & 0xfffff000) | (((x)>>8) & 0x00000fff) ))
   6 #define minor(x) \
   7         ((unsigned)( (((x)>>12) & 0xffffff00) | ((x) & 0x000000ff) ))
   8
   9 #define makedev(x,y) ( \
  10         (((x)&0xfffff000ULL) << 32) | \
  11         (((x)&0x00000fffULL) << 8) | \
  12         (((y)&0xffffff00ULL) << 12) | \
  13         (((y)&0x000000ffULL)) )
  14
  15 #endif