linux-kernel - [PATCH 3/6] virtio-blk: remove the unused list of pending requests

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Date:	Wed, 21 Dec 2011 10:00:51 +0900
From:	Minchan Kim <minchan@...nel.org>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	Chris Wright <chrisw@...s-sol.org>, Jens Axboe <axboe@...nel.dk>,
	Stefan Hajnoczi <stefanha@...ux.vnet.ibm.com>,
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	Christoph Hellwig <hch@...radead.org>,
	Christoph Hellwig <hch@....de>,
	Minchan Kim <minchan@...hat.com>
Subject: [PATCH 3/6] virtio-blk: remove the unused list of pending requests

From: Christoph Hellwig <hch@....de>

Signed-off-by: Christoph Hellwig <hch@....de>
Signed-off-by: Minchan Kim <minchan@...hat.com>
---
 drivers/block/virtio_blk.c |   10 ----------
 1 files changed, 0 insertions(+), 10 deletions(-)

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 4d0b70a..26d4443 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -28,9 +28,6 @@ struct virtio_blk
 	/* The disk structure for the kernel. */
 	struct gendisk *disk;
 
-	/* Request tracking. */
-	struct list_head reqs;
-
 	mempool_t *pool;
 
 	/* Process context for config space updates */
@@ -48,7 +45,6 @@ struct virtio_blk
 
 struct virtblk_req
 {
-	struct list_head list;
 	struct request *req;
 	struct virtio_blk_outhdr out_hdr;
 	struct virtio_scsi_inhdr in_hdr;
@@ -92,7 +88,6 @@ static void blk_done(struct virtqueue *vq)
 		}
 
 		__blk_end_request_all(vbr->req, error);
-		list_del(&vbr->list);
 		mempool_free(vbr, vblk->pool);
 	}
 	/* In case queue is stopped waiting for more buffers. */
@@ -177,7 +172,6 @@ static bool do_req(struct request_queue *q, struct virtio_blk *vblk,
 		return false;
 	}
 
-	list_add_tail(&vbr->list, &vblk->reqs);
 	return true;
 }
 
@@ -383,7 +377,6 @@ static int __devinit virtblk_probe(struct virtio_device *vdev)
 		goto out_free_index;
 	}
 
-	INIT_LIST_HEAD(&vblk->reqs);
 	spin_lock_init(&vblk->lock);
 	vblk->vdev = vdev;
 	vblk->sg_elems = sg_elems;
@@ -544,9 +537,6 @@ static void __devexit virtblk_remove(struct virtio_device *vdev)
 
 	flush_work(&vblk->config_work);
 
-	/* Nothing should be pending. */
-	BUG_ON(!list_empty(&vblk->reqs));
-
 	/* Stop all the virtqueues. */
 	vdev->config->reset(vdev);
 
-- 
1.7.6.4

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