[net-next-2.6.git] / include / asm-generic / getorder.h

#ifndef __ASM_GENERIC_GETORDER_H
#define __ASM_GENERIC_GETORDER_H

#ifndef __ASSEMBLY__

#include <linux/compiler.h>

/* Pure 2^n version of get_order */
static inline __attribute_const__ int get_order(unsigned long size)
{
	int order;

	size = (size - 1) >> (PAGE_SHIFT - 1);
	order = -1;
	do {
		size >>= 1;
		order++;
	} while (size);
	return order;
}

#endif	/* __ASSEMBLY__ */

#endif	/* __ASM_GENERIC_GETORDER_H */
Commit	Line	Data
5b17e1cd AB	1	#ifndef __ASM_GENERIC_GETORDER_H
5b17e1cd AB	2	#define __ASM_GENERIC_GETORDER_H
fd4fd5aa	3
fd4fd5aa SR	4	#ifndef __ASSEMBLY__
fd4fd5aa SR	5
38f33230	6	#include <linux/compiler.h>
fd4fd5aa	7
38f33230	8	/* Pure 2^n version of get_order */
5b17e1cd	9	static inline __attribute_const__ int get_order(unsigned long size)
fd4fd5aa SR	10	{
	11	int order;
	12
38f33230	13	size = (size - 1) >> (PAGE_SHIFT - 1);
fd4fd5aa SR	14	order = -1;
	15	do {
	16	size >>= 1;
	17	order++;
	18	} while (size);
	19	return order;
	20	}
	21
	22	#endif /* __ASSEMBLY__ */
fd4fd5aa	23
5b17e1cd	24	#endif /* __ASM_GENERIC_GETORDER_H */