BUF_PIN
rbufp->flags |= BUF_PIN;
save_bufp->flags &= ~BUF_PIN;
save_bufp->flags &= ~BUF_PIN;
save_bufp->flags &= ~BUF_PIN;
save_bufp->flags &= ~BUF_PIN;
save_bufp->flags &= ~BUF_PIN;
save_bufp->flags &= ~BUF_PIN;
save_bufp->flags &= ~BUF_PIN;
save_bufp->flags &= ~BUF_PIN;
save_bufp->flags &= ~BUF_PIN;
if (hashp->nbufs || (bp->flags & BUF_PIN) || bp == hashp->cpage) {
old_bufp->flags |= (BUF_MOD | BUF_PIN);
new_bufp->flags |= (BUF_MOD | BUF_PIN);
old_bufp->flags &= ~BUF_PIN;
new_bufp->flags &= ~BUF_PIN;
old_bufp->flags &= ~BUF_PIN;
new_bufp->flags &= ~BUF_PIN;