86 #define	MRU	hashp->bufhead.next
87 #define	LRU	hashp->bufhead.prev
89 #define MRU_INSERT(B)	BUF_INSERT((B), &hashp->bufhead)
110 __get_buf(HTAB *hashp,  in __get_buf()  argument
130 		segment_ndx = addr & (hashp->SGSIZE - 1);  in __get_buf()
133 		segp = hashp->dir[addr >> hashp->SSHIFT];  in __get_buf()
139 		is_disk = is_disk_mask || !hashp->new_file;  in __get_buf()
143 		bp = newbuf(hashp, addr, prev_bp);  in __get_buf()
145 		    __get_page(hashp, bp->page, addr, !prev_bp, is_disk, 0))  in __get_buf()
164 newbuf(HTAB *hashp,  in newbuf()  argument
181 	if (hashp->nbufs || (bp->flags & BUF_PIN)) {  in newbuf()
188 		if ((bp->page = (char *)malloc(hashp->BSIZE)) == NULL) {  in newbuf()
193 		memset(bp->page, 0xff, hashp->BSIZE);  in newbuf()
195 		if (hashp->nbufs)  in newbuf()
196 			hashp->nbufs--;  in newbuf()
212 			if ((bp->flags & BUF_MOD) && __put_page(hashp, bp->page,  in newbuf()
224 				segment_ndx = bp->addr & (hashp->SGSIZE - 1);  in newbuf()
225 				segp = hashp->dir[bp->addr >> hashp->SSHIFT];  in newbuf()
230 				if (hashp->new_file &&  in newbuf()
256 				if ((xbp->flags & BUF_MOD) && __put_page(hashp,  in newbuf()
293 __buf_init(HTAB *hashp,	int nbytes)  in __buf_init()  argument
298 	bfp = &(hashp->bufhead);  in __buf_init()
299 	npages = (nbytes + hashp->BSIZE - 1) >> hashp->BSHIFT;  in __buf_init()
302 	hashp->nbufs = npages;  in __buf_init()
316 __buf_free(HTAB *hashp,	int do_free, int to_disk)  in __buf_free()  argument
323 	for (bp = LRU; bp != &hashp->bufhead;) {  in __buf_free()
327 			    __put_page(hashp, bp->page,  in __buf_free()
345 __reclaim_buf(HTAB *hashp, BUFHEAD *bp)  in __reclaim_buf()  argument