netdev - Re: [PATCH 09/23] virtio_blk: use bvec_set_virt to initialize special

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Date:   Mon, 30 Jan 2023 10:17:58 -0500
From:   "Michael S. Tsirkin" <mst@...hat.com>
To:     Christoph Hellwig <hch@....de>
Cc:     Jens Axboe <axboe@...nel.dk>, Ilya Dryomov <idryomov@...il.com>,
        Jason Wang <jasowang@...hat.com>,
        Minchan Kim <minchan@...nel.org>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Keith Busch <kbusch@...nel.org>,
        Sagi Grimberg <sagi@...mberg.me>,
        Chaitanya Kulkarni <kch@...dia.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        David Howells <dhowells@...hat.com>,
        Marc Dionne <marc.dionne@...istor.com>,
        Xiubo Li <xiubli@...hat.com>, Steve French <sfrench@...ba.org>,
        Trond Myklebust <trond.myklebust@...merspace.com>,
        Anna Schumaker <anna@...nel.org>,
        Mike Marshall <hubcap@...ibond.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Chuck Lever <chuck.lever@...cle.com>,
        linux-block@...r.kernel.org, ceph-devel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
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        linux-mm@...ck.org
Subject: Re: [PATCH 09/23] virtio_blk: use bvec_set_virt to initialize
 special_vec

On Mon, Jan 30, 2023 at 10:21:43AM +0100, Christoph Hellwig wrote:
> Use the bvec_set_virt helper to initialize the special_vec.
> 
> Signed-off-by: Christoph Hellwig <hch@....de>

Acked-by: Michael S. Tsirkin <mst@...hat.com>


> ---
>  drivers/block/virtio_blk.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
> index 6a77fa91742880..dc6e9b989910b0 100644
> --- a/drivers/block/virtio_blk.c
> +++ b/drivers/block/virtio_blk.c
> @@ -170,9 +170,7 @@ static int virtblk_setup_discard_write_zeroes_erase(struct request *req, bool un
>  
>  	WARN_ON_ONCE(n != segments);
>  
> -	req->special_vec.bv_page = virt_to_page(range);
> -	req->special_vec.bv_offset = offset_in_page(range);
> -	req->special_vec.bv_len = sizeof(*range) * segments;
> +	bvec_set_virt(&req->special_vec, range, sizeof(*range) * segments);
>  	req->rq_flags |= RQF_SPECIAL_PAYLOAD;
>  
>  	return 0;
> -- 
> 2.39.0