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[PATCH] bitops: generic ffz()
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This patch introduces the C-language equivalent of the function: unsigned long
ffz(unsigned long word);

In include/asm-generic/bitops/ffz.h

This code largely copied from: include/asm-parisc/bitops.h

Signed-off-by: Akinobu Mita <mita@miraclelinux.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Akinobu Mita authored and Linus Torvalds committed Mar 26, 2006
1 parent c1226a0 commit 176d8b0
Showing 1 changed file with 12 additions and 0 deletions.
12 changes: 12 additions & 0 deletions include/asm-generic/bitops/ffz.h
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#ifndef _ASM_GENERIC_BITOPS_FFZ_H_
#define _ASM_GENERIC_BITOPS_FFZ_H_

/*
* ffz - find first zero in word.
* @word: The word to search
*
* Undefined if no zero exists, so code should check against ~0UL first.
*/
#define ffz(x) __ffs(~(x))

#endif /* _ASM_GENERIC_BITOPS_FFZ_H_ */

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