B_NOREUSE
KASSERT((bp->b_flags & (B_DELWRI | B_NOREUSE)) == 0,
KASSERT((bp->b_flags & B_VMIO) != 0 || (bp->b_flags & B_NOREUSE) == 0,
(bp->b_flags & (B_DELWRI | B_NOREUSE)) == B_NOREUSE) {
bp->b_flags &= ~B_NOREUSE;
if ((bp->b_flags & B_NOREUSE) != 0) {
flags = (bp->b_flags & B_NOREUSE) != 0 ? VPR_NOREUSE : 0;
flags = (bp->b_flags & B_NOREUSE) != 0 ? VPR_NOREUSE : 0;
bp->b_flags |= B_NOREUSE;
bp->b_flags |= B_NOREUSE;