#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_ */