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v0.5.1
https://github.com/torvalds/linux
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Tip revision: b6ff50833ad43a8ebd9b16bf53c334f7aaf33c41 authored by Linus Torvalds on 30 July 2006, 06:15:36 UTC
Linux v2.6.18-rc3
Tip revision: b6ff508
page.h
#ifndef _ASM_GENERIC_PAGE_H
#define _ASM_GENERIC_PAGE_H

#ifdef __KERNEL__
#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	/* __KERNEL__ */

#endif	/* _ASM_GENERIC_PAGE_H */
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