From: Colin King
> Sent: 20 October 2020 15:47
>
> From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
>
> Don't populate the const array dev_names on the stack but instead it
> static. Makes the object code smaller by 15 bytes.
>
> Before:
> text data bss dec hex filename
> 17091 2648 64 19803 4d5b media/rkisp1/rkisp1-resizer.o
>
> After:
> text data bss dec hex filename
> 17012 2712 64 19788 4d4c media/rkisp1/rkisp1-resizer.o
>
> (gcc version 10.2.0)
>
> Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
> ---
> drivers/staging/media/rkisp1/rkisp1-resizer.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/staging/media/rkisp1/rkisp1-resizer.c b/drivers/staging/media/rkisp1/rkisp1-
> resizer.c
> index 1687d82e6c68..7ca5b47c5bf5 100644
> --- a/drivers/staging/media/rkisp1/rkisp1-resizer.c
> +++ b/drivers/staging/media/rkisp1/rkisp1-resizer.c
> @@ -763,8 +763,10 @@ static void rkisp1_rsz_unregister(struct rkisp1_resizer *rsz)
>
> static int rkisp1_rsz_register(struct rkisp1_resizer *rsz)
> {
> - const char * const dev_names[] = {RKISP1_RSZ_MP_DEV_NAME,
> - RKISP1_RSZ_SP_DEV_NAME};
> + static const char * const dev_names[] = {
> + RKISP1_RSZ_MP_DEV_NAME,
> + RKISP1_RSZ_SP_DEV_NAME
> + };
> struct media_pad *pads = rsz->pads;
> struct v4l2_subdev *sd = &rsz->sd;
> int ret;
Don't look at what that code is actually doing....
It is rather horrid.
rkisp1_rsz_register() is called for each entry in an array (twice).
The array index is written into rsz->id.
The value is then used to select one of the two strings.
But rsz->id is actually an enum type.
rkisp1_rsz_register() should probably just be called twice with some
extra parameters.
David
-
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