https://github.com/torvalds/linux
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Tip revision: cac7f2429872d3733dc3f9915857b1691da2eb2f authored by Linus Torvalds on 26 October 2014, 23:48:41 UTC
Linux 3.18-rc2
Tip revision: cac7f24
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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