linux-kernel - [RFC PATCH 09/17] virtio_pmem: Remove unused used length

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Date:   Mon, 17 May 2021 17:08:28 +0800
From:   Xie Yongji <xieyongji@...edance.com>
To:     mst@...hat.com, jasowang@...hat.com, stefanha@...hat.com
Cc:     amit@...nel.org, arei.gonglei@...wei.com, airlied@...ux.ie,
        kraxel@...hat.com, dan.j.williams@...el.com,
        johannes@...solutions.net, ohad@...ery.com,
        bjorn.andersson@...aro.org, david@...hat.com, vgoyal@...hat.com,
        miklos@...redi.hu, sgarzare@...hat.com,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: [RFC PATCH 09/17] virtio_pmem: Remove unused used length

The used length is not used. Let's drop it and
pass NULL to virtqueue_get_buf() instead.

Signed-off-by: Xie Yongji <xieyongji@...edance.com>
---
 drivers/nvdimm/nd_virtio.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/nvdimm/nd_virtio.c b/drivers/nvdimm/nd_virtio.c
index 10351d5b49fa..f57d7663b505 100644
--- a/drivers/nvdimm/nd_virtio.c
+++ b/drivers/nvdimm/nd_virtio.c
@@ -15,10 +15,9 @@ void virtio_pmem_host_ack(struct virtqueue *vq)
 	struct virtio_pmem *vpmem = vq->vdev->priv;
 	struct virtio_pmem_request *req_data, *req_buf;
 	unsigned long flags;
-	unsigned int len;
 
 	spin_lock_irqsave(&vpmem->pmem_lock, flags);
-	while ((req_data = virtqueue_get_buf(vq, &len)) != NULL) {
+	while ((req_data = virtqueue_get_buf(vq, NULL)) != NULL) {
 		req_data->done = true;
 		wake_up(&req_data->host_acked);
 
-- 
2.11.0