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