* [PATCH] media: vb2 dma-contig: Constify dma_buf_ops structures.
@ 2017-07-01 11:27 ` Arvind Yadav
2017-07-04 5:22 ` Marek Szyprowski
0 siblings, 1 reply; 2+ messages in thread
From: Arvind Yadav @ 2017-07-01 11:27 UTC (permalink / raw)
To: pawel, m.szyprowski, kyungmin.park, mchehab; +Cc: linux-media, linux-kernel
dma_buf_ops are not supposed to change at runtime. All functions
working with dma_buf_ops provided by <linux/dma-buf.h> work with
const dma_buf_ops. So mark the non-const structs as const.
File size before:
text data bss dec hex filename
6035 272 0 6307 18a3 drivers/media/v4l2-core/videobuf2-dma-contig.o
File size After adding 'const':
text data bss dec hex filename
6155 160 0 6315 18ab drivers/media/v4l2-core/videobuf2-dma-contig.o
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
---
drivers/media/v4l2-core/videobuf2-dma-contig.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/media/v4l2-core/videobuf2-dma-contig.c b/drivers/media/v4l2-core/videobuf2-dma-contig.c
index 4f246d1..5b90a66 100644
--- a/drivers/media/v4l2-core/videobuf2-dma-contig.c
+++ b/drivers/media/v4l2-core/videobuf2-dma-contig.c
@@ -352,7 +352,7 @@ static int vb2_dc_dmabuf_ops_mmap(struct dma_buf *dbuf,
return vb2_dc_mmap(dbuf->priv, vma);
}
-static struct dma_buf_ops vb2_dc_dmabuf_ops = {
+static const struct dma_buf_ops vb2_dc_dmabuf_ops = {
.attach = vb2_dc_dmabuf_ops_attach,
.detach = vb2_dc_dmabuf_ops_detach,
.map_dma_buf = vb2_dc_dmabuf_ops_map,
--
2.7.4
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] media: vb2 dma-contig: Constify dma_buf_ops structures.
2017-07-01 11:27 ` [PATCH] media: vb2 dma-contig: Constify dma_buf_ops structures Arvind Yadav
@ 2017-07-04 5:22 ` Marek Szyprowski
0 siblings, 0 replies; 2+ messages in thread
From: Marek Szyprowski @ 2017-07-04 5:22 UTC (permalink / raw)
To: Arvind Yadav, pawel, kyungmin.park, mchehab; +Cc: linux-media, linux-kernel
Hi Arvind,
On 2017-07-01 13:27, Arvind Yadav wrote:
> dma_buf_ops are not supposed to change at runtime. All functions
> working with dma_buf_ops provided by <linux/dma-buf.h> work with
> const dma_buf_ops. So mark the non-const structs as const.
>
> File size before:
> text data bss dec hex filename
> 6035 272 0 6307 18a3 drivers/media/v4l2-core/videobuf2-dma-contig.o
>
> File size After adding 'const':
> text data bss dec hex filename
> 6155 160 0 6315 18ab drivers/media/v4l2-core/videobuf2-dma-contig.o
>
> Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Thanks!
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
> ---
> drivers/media/v4l2-core/videobuf2-dma-contig.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/media/v4l2-core/videobuf2-dma-contig.c b/drivers/media/v4l2-core/videobuf2-dma-contig.c
> index 4f246d1..5b90a66 100644
> --- a/drivers/media/v4l2-core/videobuf2-dma-contig.c
> +++ b/drivers/media/v4l2-core/videobuf2-dma-contig.c
> @@ -352,7 +352,7 @@ static int vb2_dc_dmabuf_ops_mmap(struct dma_buf *dbuf,
> return vb2_dc_mmap(dbuf->priv, vma);
> }
>
> -static struct dma_buf_ops vb2_dc_dmabuf_ops = {
> +static const struct dma_buf_ops vb2_dc_dmabuf_ops = {
> .attach = vb2_dc_dmabuf_ops_attach,
> .detach = vb2_dc_dmabuf_ops_detach,
> .map_dma_buf = vb2_dc_dmabuf_ops_map,
Best regards
--
Marek Szyprowski, PhD
Samsung R&D Institute Poland
^ permalink raw reply [flat|nested] 2+ messages in thread
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2017-07-01 11:27 ` [PATCH] media: vb2 dma-contig: Constify dma_buf_ops structures Arvind Yadav
2017-07-04 5:22 ` Marek Szyprowski
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