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author | Stephen Rothwell <sfr@canb.auug.org.au> | 2009-05-18 17:55:24 +1000 |
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committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2009-05-18 17:55:24 +1000 |
commit | a42bc5ef61cd6a1e7b9ef9a04a16bae628e23d6c (patch) | |
tree | e41ef340022a85abeefa9cba070c30acda5e0b06 /include/asm-generic/getorder.h | |
parent | fe8b44a9ede7df70b886e53d3ca609eaa675aaf1 (diff) | |
parent | 52f9ce5dd9c55445b658cde1d3883afa871b4828 (diff) |
Merge commit 'asm-generic/next'
Diffstat (limited to 'include/asm-generic/getorder.h')
-rw-r--r-- | include/asm-generic/getorder.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/asm-generic/getorder.h b/include/asm-generic/getorder.h new file mode 100644 index 000000000000..67e7245dc9b3 --- /dev/null +++ b/include/asm-generic/getorder.h @@ -0,0 +1,24 @@ +#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 */ |