mirror of https://gitee.com/openkylin/linux.git
27 lines
452 B
C
27 lines
452 B
C
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#ifndef _ASM_GENERIC_PAGE_H
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#define _ASM_GENERIC_PAGE_H
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#ifdef __KERNEL__
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#ifndef __ASSEMBLY__
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#include <linux/compiler.h>
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/* Pure 2^n version of get_order */
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static __inline__ __attribute_const__ int get_order(unsigned long size)
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{
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int order;
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size = (size - 1) >> (PAGE_SHIFT - 1);
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order = -1;
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do {
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size >>= 1;
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order++;
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} while (size);
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return order;
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}
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#endif /* __ASSEMBLY__ */
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#endif /* __KERNEL__ */
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#endif /* _ASM_GENERIC_PAGE_H */
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