374 int z_erofs_stream_switch_bufs(struct z_erofs_stream_dctx *dctx, void **dst,  in z_erofs_stream_switch_bufs()  argument
377 	struct z_erofs_decompress_req *rq = dctx->rq;  in z_erofs_stream_switch_bufs()
382 	if (!dctx->avail_out) {  in z_erofs_stream_switch_bufs()
383 		if (++dctx->no >= dctx->outpages || !rq->outputsize) {  in z_erofs_stream_switch_bufs()
388 		if (dctx->kout)  in z_erofs_stream_switch_bufs()
389 			kunmap_local(dctx->kout);  in z_erofs_stream_switch_bufs()
390 		dctx->avail_out = min(rq->outputsize, PAGE_SIZE - rq->pageofs_out);  in z_erofs_stream_switch_bufs()
391 		rq->outputsize -= dctx->avail_out;  in z_erofs_stream_switch_bufs()
392 		pgo = &rq->out[dctx->no];  in z_erofs_stream_switch_bufs()
396 				dctx->kout = NULL;  in z_erofs_stream_switch_bufs()
402 			dctx->kout = kmap_local_page(*pgo);  in z_erofs_stream_switch_bufs()
403 			*dst = dctx->kout + rq->pageofs_out;  in z_erofs_stream_switch_bufs()
405 			*dst = dctx->kout = NULL;  in z_erofs_stream_switch_bufs()
410 	if (dctx->inbuf_pos == dctx->inbuf_sz && rq->inputsize) {  in z_erofs_stream_switch_bufs()
411 		if (++dctx->ni >= dctx->inpages) {  in z_erofs_stream_switch_bufs()
415 		if (dctx->kout) /* unlike kmap(), take care of the orders */  in z_erofs_stream_switch_bufs()
416 			kunmap_local(dctx->kout);  in z_erofs_stream_switch_bufs()
417 		kunmap_local(dctx->kin);  in z_erofs_stream_switch_bufs()
419 		dctx->inbuf_sz = min_t(u32, rq->inputsize, PAGE_SIZE);  in z_erofs_stream_switch_bufs()
420 		rq->inputsize -= dctx->inbuf_sz;  in z_erofs_stream_switch_bufs()
421 		dctx->kin = kmap_local_page(rq->in[dctx->ni]);  in z_erofs_stream_switch_bufs()
422 		*src = dctx->kin;  in z_erofs_stream_switch_bufs()
423 		dctx->bounced = false;  in z_erofs_stream_switch_bufs()
424 		if (dctx->kout) {  in z_erofs_stream_switch_bufs()
425 			j = (u8 *)*dst - dctx->kout;  in z_erofs_stream_switch_bufs()
426 			dctx->kout = kmap_local_page(rq->out[dctx->no]);  in z_erofs_stream_switch_bufs()
427 			*dst = dctx->kout + j;  in z_erofs_stream_switch_bufs()
429 		dctx->inbuf_pos = 0;  in z_erofs_stream_switch_bufs()
438 	if (!dctx->bounced && rq->out[dctx->no] == rq->in[dctx->ni]) {  in z_erofs_stream_switch_bufs()
439 		memcpy(dctx->bounce, *src, dctx->inbuf_sz);  in z_erofs_stream_switch_bufs()
440 		*src = dctx->bounce;  in z_erofs_stream_switch_bufs()
441 		dctx->bounced = true;  in z_erofs_stream_switch_bufs()
444 	for (j = dctx->ni + 1; j < dctx->inpages; ++j) {  in z_erofs_stream_switch_bufs()
445 		if (rq->out[dctx->no] != rq->in[j])  in z_erofs_stream_switch_bufs()