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v0.5.1
https://github.com/torvalds/linux
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Tip revision: 802eee95bde72fd0cd0f3a5b2098375a487d1eda authored by Linus Torvalds on 30 December 2013, 00:01:33 UTC
Linux 3.13-rc6
Tip revision: 802eee9
builtin-ffs.h
#ifndef _ASM_GENERIC_BITOPS_BUILTIN_FFS_H_
#define _ASM_GENERIC_BITOPS_BUILTIN_FFS_H_

/**
 * ffs - find first bit set
 * @x: the word to search
 *
 * This is defined the same way as
 * the libc and compiler builtin ffs routines, therefore
 * differs in spirit from the above ffz (man ffs).
 */
static __always_inline int ffs(int x)
{
	return __builtin_ffs(x);
}

#endif
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