fd4fd5aac1
Someone mentioned that almost all the architectures used basically the same implementation of get_order. This patch consolidates them into asm-generic/page.h and includes that in the appropriate places. The exceptions are ia64 and ppc which have their own (presumably optimised) versions. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
27 lines
452 B
C
27 lines
452 B
C
#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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