[PATCH] video: fbdev: s3c-fb: remove redundant initialization of pointer bufs

[PATCH] video: fbdev: s3c-fb: remove redundant initialization of pointer bufs

[Colin Ian King]

Pointer bufs is being initialized with a value that is never read, it
is being re-assigned with a different value later on. The assignment
is redundant and can be removed. Cleans up clang-scan warning:

drivers/video/fbdev/s3c-fb.c:492:16: warning: Value stored to 'buf'
during its initialization is never read [deadcode.DeadStores]
        void __iomem *buf = regs;

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
---
 drivers/video/fbdev/s3c-fb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/video/fbdev/s3c-fb.c b/drivers/video/fbdev/s3c-fb.c
index 3b134e1bbc38..68408c499627 100644
--- a/drivers/video/fbdev/s3c-fb.c
+++ b/drivers/video/fbdev/s3c-fb.c
@@ -489,7 +489,7 @@ static int s3c_fb_set_par(struct fb_info *info)
 	struct s3c_fb_win *win = info->par;
 	struct s3c_fb *sfb = win->parent;
 	void __iomem *regs = sfb->regs;
-	void __iomem *buf = regs;
+	void __iomem *buf;
 	int win_no = win->index;
 	u32 alpha = 0;
 	u32 data;
-- 
2.33.1

Re: [PATCH] video: fbdev: s3c-fb: remove redundant initialization of pointer bufs

[Daniel Vetter]

On Thu, Dec 30, 2021 at 04:06:26PM +0000, Colin Ian King wrote:
> Pointer bufs is being initialized with a value that is never read, it
> is being re-assigned with a different value later on. The assignment
> is redundant and can be removed. Cleans up clang-scan warning:
> 
> drivers/video/fbdev/s3c-fb.c:492:16: warning: Value stored to 'buf'
> during its initialization is never read [deadcode.DeadStores]
>         void __iomem *buf = regs;
> 
> Signed-off-by: Colin Ian King <colin.i.king@gmail.com>

Both of your dead store fixes queued up in drm-misc-next for 5.18.
-Daniel

> ---
>  drivers/video/fbdev/s3c-fb.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/video/fbdev/s3c-fb.c b/drivers/video/fbdev/s3c-fb.c
> index 3b134e1bbc38..68408c499627 100644
> --- a/drivers/video/fbdev/s3c-fb.c
> +++ b/drivers/video/fbdev/s3c-fb.c
> @@ -489,7 +489,7 @@ static int s3c_fb_set_par(struct fb_info *info)
>  	struct s3c_fb_win *win = info->par;
>  	struct s3c_fb *sfb = win->parent;
>  	void __iomem *regs = sfb->regs;
> -	void __iomem *buf = regs;
> +	void __iomem *buf;
>  	int win_no = win->index;
>  	u32 alpha = 0;
>  	u32 data;
> -- 
> 2.33.1
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch