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| author | Rusty Russell <rusty@rustcorp.com.au> | 2009-01-01 02:42:19 +0300 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2009-01-01 02:42:19 +0300 |
| commit | ab53d472e785e51fdfc08fc1d66252c1153e6c0f (patch) | |
| tree | 19abab13d2e4e8fe00f960c0ac475e14bfb1a44e /include | |
| parent | 0db5d3d2f58804edb394e8008c7d9744110338a2 (diff) | |
| download | linux-ab53d472e785e51fdfc08fc1d66252c1153e6c0f.tar.xz | |
bitmap: find_last_bit()
Impact: New API
As the name suggests. For the moment everyone uses the generic one.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/bitops.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/include/linux/bitops.h b/include/linux/bitops.h index 024f2b027244..61829139795a 100644 --- a/include/linux/bitops.h +++ b/include/linux/bitops.h @@ -134,9 +134,20 @@ extern unsigned long find_first_bit(const unsigned long *addr, */ extern unsigned long find_first_zero_bit(const unsigned long *addr, unsigned long size); - #endif /* CONFIG_GENERIC_FIND_FIRST_BIT */ +#ifdef CONFIG_GENERIC_FIND_LAST_BIT +/** + * find_last_bit - find the last set bit in a memory region + * @addr: The address to start the search at + * @size: The maximum size to search + * + * Returns the bit number of the first set bit, or size. + */ +extern unsigned long find_last_bit(const unsigned long *addr, + unsigned long size); +#endif /* CONFIG_GENERIC_FIND_LAST_BIT */ + #ifdef CONFIG_GENERIC_FIND_NEXT_BIT /** |