/* SPDX-License-Identifier: GPL-2.0 */#ifndef __ASM_GENERIC_GETORDER_H#define __ASM_GENERIC_GETORDER_H #ifndef __ASSEMBLER__ #include <linux/compiler.h>#include <linux/log2.h> /** * get_order - Determine the allocation order of a memory size * @size: The size for which to get the order * * Determine the allocation order of a particular sized block of memory.  This * is on a logarithmic scale, where: * *	0 -> 2^0 * PAGE_SIZE and below *	1 -> 2^1 * PAGE_SIZE to 2^0 * PAGE_SIZE + 1 *	2 -> 2^2 * PAGE_SIZE to 2^1 * PAGE_SIZE + 1 *	3 -> 2^3 * PAGE_SIZE to 2^2 * PAGE_SIZE + 1 *	4 -> 2^4 * PAGE_SIZE to 2^3 * PAGE_SIZE + 1 *	... * * The order returned is used to find the smallest allocation granule required * to hold an object of the specified size. * * The result is undefined if the size is 0. */static __always_inline __attribute_const__ int get_order(unsigned long size){	if (__builtin_constant_p(size)) {		if (!size)			return BITS_PER_LONG - PAGE_SHIFT; 		if (size < (1UL << PAGE_SHIFT))			return 0; 		return ilog2((size) - 1) - PAGE_SHIFT + 1;	} 	size--;	size >>= PAGE_SHIFT;#if BITS_PER_LONG == 32	return fls(size);#else	return fls64(size);#endif} #endif	/* __ASSEMBLER__ */ #endif	/* __ASM_GENERIC_GETORDER_H */