include/linux/pfn.h

   1 #ifndef _LINUX_PFN_H_
   2 #define _LINUX_PFN_H_
   3
   4 #define PFN_ALIGN(x)    (((unsigned long)(x) + (PAGE_SIZE - 1)) & PAGE_MASK)
   5 #define PFN_UP(x)       (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
   6 #define PFN_DOWN(x)     ((x) >> PAGE_SHIFT)
   7 #define PFN_PHYS(x)     ((x) << PAGE_SHIFT)
   8
   9 #endif