230 		struct xbuf_brk *brkp;  in ddi_xbuf_qstrategy()  local
232 		brkp = kmem_zalloc(sizeof (struct xbuf_brk), KM_SLEEP);  in ddi_xbuf_qstrategy()
233 		_NOTE(NOW_INVISIBLE_TO_OTHER_THREADS(*brkp))  in ddi_xbuf_qstrategy()
234 		mutex_init(&brkp->mutex, NULL, MUTEX_DRIVER, NULL);  in ddi_xbuf_qstrategy()
235 		brkp->bp0 = bp;  in ddi_xbuf_qstrategy()
236 		brkp->brksize = xap->xa_brksize;  in ddi_xbuf_qstrategy()
237 		brkp->brkblk = btodt(xap->xa_brksize);  in ddi_xbuf_qstrategy()
238 		brkp->noff = xap->xa_brksize;  in ddi_xbuf_qstrategy()
239 		brkp->blkno = bp->b_blkno;  in ddi_xbuf_qstrategy()
240 		_NOTE(NOW_VISIBLE_TO_OTHER_THREADS(*brkp))  in ddi_xbuf_qstrategy()
241 		bp->b_private = brkp;  in ddi_xbuf_qstrategy()
306 		struct xbuf_brk *brkp = (struct xbuf_brk *)bp->b_clone_private;  in ddi_xbuf_done()  local
308 		brkp->active--;  in ddi_xbuf_done()
309 		if (brkp->active || xap->xa_headp == brkp->bp0) {  in ddi_xbuf_done()
312 			brkp->off = -1;	/* mark bp0 as completed */  in ddi_xbuf_done()
331 	struct xbuf_brk *brkp = (struct xbuf_brk *)bp->b_clone_private;  in xbuf_brk_done()  local
332 	struct buf *bp0 = brkp->bp0;  in xbuf_brk_done()
335 	mutex_enter(&brkp->mutex);  in xbuf_brk_done()
344 	brkp->nbufs--;  in xbuf_brk_done()
346 	done = (brkp->off == -1 && brkp->nbufs == 0);  in xbuf_brk_done()
347 	mutex_exit(&brkp->mutex);  in xbuf_brk_done()
351 		mutex_destroy(&brkp->mutex);  in xbuf_brk_done()
352 		kmem_free(brkp, sizeof (struct xbuf_brk));  in xbuf_brk_done()
497 			struct xbuf_brk *brkp = bp->b_private;  in xbuf_iostart()  local
500 			brkp->active++;  in xbuf_iostart()
502 			mutex_enter(&brkp->mutex);  in xbuf_iostart()
503 			brkp->nbufs++;  in xbuf_iostart()
504 			mutex_exit(&brkp->mutex);  in xbuf_iostart()
506 			if (brkp->noff < bp0->b_bcount) {  in xbuf_iostart()
507 				bp = bioclone(bp0, brkp->off, brkp->brksize,  in xbuf_iostart()
508 				    bp0->b_edev, brkp->blkno, xbuf_brk_done,  in xbuf_iostart()
512 				brkp->off = brkp->noff;  in xbuf_iostart()
513 				brkp->noff += brkp->brksize;  in xbuf_iostart()
514 				brkp->blkno += brkp->brkblk;  in xbuf_iostart()
516 				bp = bioclone(bp0, brkp->off,  in xbuf_iostart()
517 				    bp0->b_bcount - brkp->off, bp0->b_edev,  in xbuf_iostart()
518 				    brkp->blkno, xbuf_brk_done, NULL, KM_SLEEP);  in xbuf_iostart()
524 			bp->b_clone_private = (struct buf *)brkp;  in xbuf_iostart()