B_RETRYWRI
bp->b_flags &= ~(B_DELWRI | B_RETRYWRI);
~(B_BUSY | B_DELWRI | B_RETRYWRI);
if ((bp->b_flags & (B_ERROR | B_DELWRI | B_RETRYWRI)) == B_RETRYWRI) {
bp->b_flags &= ~B_RETRYWRI;
if ((bp->b_flags & (B_READ | B_RETRYWRI)) == B_RETRYWRI) {
(bp)->b_flags |= B_RETRYWRI; \
(bp)->b_flags |= B_RETRYWRI; \
(bp)->b_flags |= B_RETRYWRI; \