HASHKEY
head = &mp->hqh[HASHKEY(bp->pgno)];
head = &mp->hqh[HASHKEY(bp->pgno)];
head = &mp->hqh[HASHKEY(bp->pgno)];
head = &mp->hqh[HASHKEY(bp->pgno)];
head = &mp->hqh[HASHKEY(bp->pgno)];
head = &mp->hqh[HASHKEY(pgno)];