HelenOS sources

fnzb64             46 kernel/generic/include/bitops.h #define fnzb(arg)  fnzb64(arg)
fnzb64            111 uspace/lib/c/include/bitops.h 	return fnzb64(arg);
fnzb64            111 uspace/lib/posix/include/libc/bitops.h 	return fnzb64(arg);