LXR linux/include/asm-generic/page.h

   1#ifndef _ASM_GENERIC_PAGE_H
   2#define _ASM_GENERIC_PAGE_H
   3
   4#ifdef __KERNEL__
   5#ifndef __ASSEMBLY__
   6
   7#include <linux/compiler.h>
   8
   9/* Pure 2^n version of get_order */
  10static __inline__ __attribute_const__ int get_order(unsigned long size)
  11{
  12        int order;
  13
  14        size = (size - 1) >> (PAGE_SHIFT - 1);
  15        order = -1;
  16        do {
  17                size >>= 1;
  18                order++;
  19        } while (size);
  20        return order;
  21}
  22
  23#endif  /* __ASSEMBLY__ */
  24#endif  /* __KERNEL__ */
  25
  26#endif  /* _ASM_GENERIC_PAGE_H */
  27