STRIPE_BIOFILL_RUN
clear_bit(STRIPE_BIOFILL_RUN, &sh->state);
test_bit(STRIPE_BIOFILL_RUN, &sh->state) ||
!test_bit(STRIPE_BIOFILL_RUN, &sh->state))
(1 << STRIPE_BIOFILL_RUN) |
if (s.to_fill && !test_bit(STRIPE_BIOFILL_RUN, &sh->state)) {
set_bit(STRIPE_BIOFILL_RUN, &sh->state);