On Mon, Jan 16, 2017 at 03:04:33PM +0100, Cornelia Huck wrote:
> From: Bhumika Goyal <bhumirks@xxxxxxxxx>
>
> Declare virtio_config_ops structure as const as it is only stored in the
> config field of a virtio_device structure. This field is of type const, so
> virtio_config_ops structures having this property can be declared const.
> Done using Coccinelle:
>
> @r1 disable optional_qualifier@
> identifier i;
> position p;
> @@
> static struct virtio_config_ops i@p={...};
>
> @ok1@
> identifier r1.i;
> position p;
> struct virtio_ccw_device x;
> @@
> x.vdev.config=&i@p
>
> @bad@
> position p!={r1.p,ok1.p};
> identifier r1.i;
> @@
> i@p
>
> @depends on !bad disable optional_qualifier@
> identifier r1.i;
> @@
> +const
> struct virtio_config_ops i;
>
> File size before and after applying the patch remains the same.
> text data bss dec hex filename
> 9235 296 32928 42459 a5db drivers/s390/virtio/virtio_ccw.o
>
> Signed-off-by: Bhumika Goyal <bhumirks@xxxxxxxxx>
> Message-Id: <1484333336-13443-1-git-send-email-bhumirks@xxxxxxxxx>
> Signed-off-by: Christian Borntraeger <borntraeger@xxxxxxxxxx>
> Signed-off-by: Cornelia Huck <cornelia.huck@xxxxxxxxxx>
I am frankly puzzled by this reporting on file sizes.
So what does it mean that it's the same?
> ---
> drivers/s390/virtio/virtio_ccw.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/s390/virtio/virtio_ccw.c b/drivers/s390/virtio/virtio_ccw.c
> index 0672c6234ae8..070c4da95f48 100644
> --- a/drivers/s390/virtio/virtio_ccw.c
> +++ b/drivers/s390/virtio/virtio_ccw.c
> @@ -944,7 +944,7 @@ static void virtio_ccw_set_status(struct virtio_device *vdev, u8 status)
> kfree(ccw);
> }
>
> -static struct virtio_config_ops virtio_ccw_config_ops = {
> +static const struct virtio_config_ops virtio_ccw_config_ops = {
> .get_features = virtio_ccw_get_features,
> .finalize_features = virtio_ccw_finalize_features,
> .get = virtio_ccw_get_config,
> --
> 2.11.0
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