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 */
  10 static __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 */