MD_CLOSING
test_bit(MD_CLOSING, &mddev->flags)))
if (!test_bit(MD_CLOSING, &mddev->flags))
|| test_bit(MD_CLOSING, &mddev->flags));
!test_bit(MD_CLOSING, &mddev->flags))
clear_bit(MD_CLOSING, &mddev->flags);
if (test_and_set_bit(MD_CLOSING, &mddev->flags)) {
clear_bit(MD_CLOSING, &mddev->flags);
mddev->flags &= BIT_ULL_MASK(MD_CLOSING);
clear_bit(MD_CLOSING, &mddev->flags);
if (test_bit(MD_CLOSING, &mddev->flags))