Re: [PATCH] s390: virtio: constify virtio_config_ops structures
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From: Christian Borntraeger <hidden>
Date: 2017-01-16 09:09:30
Also in:
kvm, linux-s390, lkml
On 01/13/2017 07:48 PM, Bhumika Goyal wrote:
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 <redacted>thanks applied.
quoted hunk
--- 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 639ed4e..6508bf4 100644 --- a/drivers/s390/virtio/virtio_ccw.c +++ b/drivers/s390/virtio/virtio_ccw.c@@ -920,7 +920,7 @@ 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,