135 static inline unsigned long ffz(unsigned long word)  in ffz()  argument
139 	word = ~word;  in ffz()
141 	if (word & 0x0000ffff) {  in ffz()
142 		k -= 16; word <<= 16;  in ffz()
144 	if (word & 0x00ff0000) {  in ffz()
145 		k -= 8;  word <<= 8;  in ffz()
147 	if (word & 0x0f000000) {  in ffz()
148 		k -= 4;  word <<= 4;  in ffz()
150 	if (word & 0x30000000) {  in ffz()
151 		k -= 2;  word <<= 2;  in ffz()
153 	if (word & 0x40000000)  in ffz()