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https://github.com/torvalds/linux
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Tip revision: 9489e9dcae718d5fde988e4a684a0f55b5f94d17 authored by Linus Torvalds on 26 November 2012, 01:59:19 UTC
Linux 3.7-rc7
Tip revision: 9489e9d
builtin-__ffs.h
#ifndef _ASM_GENERIC_BITOPS_BUILTIN___FFS_H_
#define _ASM_GENERIC_BITOPS_BUILTIN___FFS_H_

/**
 * __ffs - find first bit in word.
 * @word: The word to search
 *
 * Undefined if no bit exists, so code should check against 0 first.
 */
static __always_inline unsigned long __ffs(unsigned long word)
{
	return __builtin_ctzl(word);
}

#endif
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