> -----Original Message-----
> From: Suwan Kim <suwan.kim027@xxxxxxxxx>
> Sent: Tuesday, April 5, 2022 10:09 AM
> Subject: [PATCH v5 1/2] virtio-blk: support polling I/O
>
> diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
> @@ -81,6 +85,7 @@ struct virtio_blk {
>
> /* num of vqs */
> int num_vqs;
> + int io_queues[HCTX_MAX_TYPES];
> struct virtio_blk_vq *vqs;
...
> };> @@ -565,6 +572,18 @@ static int init_vq(struct virtio_blk *vblk)
> min_not_zero(num_request_queues, nr_cpu_ids),
> num_vqs);
>
> + num_poll_vqs = min_t(unsigned int, poll_queues, num_vqs - 1);
> +
> + memset(vblk->io_queues, 0, sizeof(int) * HCTX_MAX_TYPES);
Using
sizeof(vblk->io_queues)
would automatically follow any changes in the definition of that field,
similar to the line below:
...
> vblk->vqs = kmalloc_array(num_vqs, sizeof(*vblk->vqs), GFP_KERNEL);
