diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2009-05-13 22:56:30 +0000 |
|---|---|---|
| committer | Arnd Bergmann <arnd@klappe2.(none)> | 2009-06-11 21:02:17 +0200 |
| commit | 5b17e1cd8928ae65932758ce6478ac6d3e9a86b2 (patch) | |
| tree | 065b3adc60a74ce0b3e3cd0fc447b8688b6d0332 /include/asm-generic/getorder.h | |
| parent | 72099ed2719fc5829bd79c6ca9d1783ed026eb37 (diff) | |
| download | lwn-5b17e1cd8928ae65932758ce6478ac6d3e9a86b2.tar.gz lwn-5b17e1cd8928ae65932758ce6478ac6d3e9a86b2.zip | |
asm-generic: rename page.h and uaccess.h
The current asm-generic/page.h only contains the get_order
function, and asm-generic/uaccess.h only implements
unaligned accesses. This renames the file to getorder.h
and uaccess-unaligned.h to make room for new page.h
and uaccess.h file that will be usable by all simple
(e.g. nommu) architectures.
Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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 */ |