83 #define	MRU	hashp->bufhead.next
84 #define	LRU	hashp->bufhead.prev
86 #define MRU_INSERT(B)	BUF_INSERT((B), &hashp->bufhead)
99 __get_buf(HTAB *hashp, u_int32_t addr,  in __get_buf()  argument
118 		segment_ndx = addr & (hashp->SGSIZE - 1);  in __get_buf()
121 		segp = hashp->dir[addr >> hashp->SSHIFT];  in __get_buf()
127 		is_disk = is_disk_mask || !hashp->new_file;  in __get_buf()
131 		bp = newbuf(hashp, addr, prev_bp);  in __get_buf()
133 		    __get_page(hashp, bp->page, addr, !prev_bp, is_disk, 0))  in __get_buf()
152 newbuf(HTAB *hashp, u_int32_t addr, BUFHEAD *prev_bp)  in newbuf()  argument
165         if (bp == hashp->cpage) {  in newbuf()
172 	if (hashp->nbufs == 0 && prev_bp && bp->ovfl) {  in newbuf()
177 				hashp->nbufs++;  in newbuf()
187 	if (hashp->nbufs || (bp->flags & BUF_PIN) || bp == hashp->cpage) {  in newbuf()
191 		if ((bp->page = (char *)calloc(1, hashp->BSIZE)) == NULL) {  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()
334 				(void)memset(bp->page, 0, hashp->BSIZE);  in __buf_free()
347 __reclaim_buf(HTAB *hashp, BUFHEAD *bp)  in __reclaim_buf()  argument