These videobuf_queue_ops structures are only passed as the second argument to videobuf_queue_vmalloc_init, which is declared as const. Thus the videobuf_queue_ops structures themselves can be const.
Done with the help of Coccinelle. // <smpl> @r disable optional_qualifier@ identifier i; position p; @@ static struct videobuf_queue_ops i@p = { ... }; @ok1@ identifier r.i; expression e1; position p; @@ videobuf_queue_vmalloc_init(e1,&i@p,...) @bad@ position p != {r.p,ok1.p}; identifier r.i; struct videobuf_queue_ops e; @@ e@i@p @depends on !bad disable optional_qualifier@ identifier r.i; @@ static +const struct videobuf_queue_ops i = { ... }; // </smpl> In the first case, there is a second commented call to videobuf_queue_sg_init with the structure as the second argument. If that code will be uncommented, the const will remain correct, because the second parameter of that function is also const. Signed-off-by: Julia Lawall <julia.law...@lip6.fr> --- drivers/media/usb/cx231xx/cx231xx-417.c | 2 +- drivers/media/usb/cx231xx/cx231xx-video.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/media/usb/cx231xx/cx231xx-417.c b/drivers/media/usb/cx231xx/cx231xx-417.c index 8d5eb99..d538fa4 100644 --- a/drivers/media/usb/cx231xx/cx231xx-417.c +++ b/drivers/media/usb/cx231xx/cx231xx-417.c @@ -1490,7 +1490,7 @@ static void bb_buf_release(struct videobuf_queue *q, free_buffer(q, buf); } -static struct videobuf_queue_ops cx231xx_qops = { +static const struct videobuf_queue_ops cx231xx_qops = { .buf_setup = bb_buf_setup, .buf_prepare = bb_buf_prepare, .buf_queue = bb_buf_queue, diff --git a/drivers/media/usb/cx231xx/cx231xx-video.c b/drivers/media/usb/cx231xx/cx231xx-video.c index f67f868..179b848 100644 --- a/drivers/media/usb/cx231xx/cx231xx-video.c +++ b/drivers/media/usb/cx231xx/cx231xx-video.c @@ -859,7 +859,7 @@ static void buffer_release(struct videobuf_queue *vq, free_buffer(vq, buf); } -static struct videobuf_queue_ops cx231xx_video_qops = { +static const struct videobuf_queue_ops cx231xx_video_qops = { .buf_setup = buffer_setup, .buf_prepare = buffer_prepare, .buf_queue = buffer_queue,