FirstUse
if (!test_bit(FirstUse, &rs->dev[i].rdev.flags) &&
set_bit(FirstUse, &rdev->flags);
if (test_bit(FirstUse, &r->flags))
if (test_bit(FirstUse, &r->flags))
if (!test_bit(FirstUse, &r->flags) && (r->raid_disk >= 0)) {
if (!test_and_clear_bit(FirstUse, &rdev->flags)) {