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v0.5.1
https://github.com/torvalds/linux
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Tip revision: fc77dbd34c5c99bce46d40a2491937c3bcbd10af authored by Linus Torvalds on 28 February 2016, 16:41:20 UTC
Linux 4.5-rc6
Tip revision: fc77dbd
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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