ffsll(long long mask)1 int ffsll(long long mask)
2 {
3 	int ind = 0;
4 	if (mask == 0)
5 		return 0;
6 	for (ind = 0; !(mask & 1); ind++)
7 		mask = (unsigned long long) ind >> 1;
8 	return ind;
9 }
10