linux-kernel - Re: [PATCH 3/3] mdacon: replace MDA

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Date:	Mon, 25 Jul 2016 09:04:29 -0700
From:	Joe Perches <joe@...ches.com>
To:	Jiri Slaby <jslaby@...e.cz>, tomi.valkeinen@...com
Cc:	plagnioj@...osoft.com, linux-fbdev@...r.kernel.org,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] mdacon: replace MDA_ADDR macro by inline function

On Mon, 2016-07-25 at 17:24 +0200, Jiri Slaby wrote:
> MDA_ADDR is one of those macros which could be an inline function. So
> convert MDA_ADDR to mda_addr.
> 
> Signed-off-by: Jiri Slaby <jslaby@...e.cz>
> ---
>  drivers/video/console/mdacon.c | 19 +++++++++++--------
>  1 file changed, 11 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/video/console/mdacon.c b/drivers/video/console/mdacon.c
> index 814606bd26d1..24fe55134eb5 100644
> --- a/drivers/video/console/mdacon.c
> +++ b/drivers/video/console/mdacon.c
> @@ -420,17 +420,20 @@ static void mdacon_invert_region(struct vc_data *c, u16 *p, int count)
>  	}
>  }
>  
> -#define MDA_ADDR(x, y)  (mda_vram_base + (y)*mda_num_columns + (x))
> +static inline u16 *mda_addr(unsigned int x, unsigned int y)

Are you sure about the unsigned?
All of the changed use are taking int

> +{
> +	return mda_vram_base + y * mda_num_columns + x;
> +}
>  
>  static void mdacon_putc(struct vc_data *c, int ch, int y, int x)
>  {
> -	scr_writew(mda_convert_attr(ch), MDA_ADDR(x, y));
> +	scr_writew(mda_convert_attr(ch), mda_addr(x, y));
>  }
>  
>  static void mdacon_putcs(struct vc_data *c, const unsigned short *s,
>  		         int count, int y, int x)
>  {
> -	u16 *dest = MDA_ADDR(x, y);
> +	u16 *dest = mda_addr(x, y);
>  
>  	for (; count > 0; count--) {
>  		scr_writew(mda_convert_attr(scr_readw(s++)), dest++);
> @@ -440,7 +443,7 @@ static void mdacon_putcs(struct vc_data *c, const unsigned short *s,
>  static void mdacon_clear(struct vc_data *c, int y, int x, 
>  			  int height, int width)
>  {
> -	u16 *dest = MDA_ADDR(x, y);
> +	u16 *dest = mda_addr(x, y);
>  	u16 eattr = mda_convert_attr(c->vc_video_erase_char);
>  
>  	if (width <= 0 || height <= 0)
> @@ -511,16 +514,16 @@ static int mdacon_scroll(struct vc_data *c, int t, int b, int dir, int lines)
>  	switch (dir) {
>  
>  	case SM_UP:
> -		scr_memmovew(MDA_ADDR(0,t), MDA_ADDR(0,t+lines),
> +		scr_memmovew(mda_addr(0, t), mda_addr(0, t + lines),
>  				(b-t-lines)*mda_num_columns*2);
> -		scr_memsetw(MDA_ADDR(0,b-lines), eattr,
> +		scr_memsetw(mda_addr(0, b - lines), eattr,
>  				lines*mda_num_columns*2);
>  		break;
>  
>  	case SM_DOWN:
> -		scr_memmovew(MDA_ADDR(0,t+lines), MDA_ADDR(0,t),
> +		scr_memmovew(mda_addr(0, t + lines), mda_addr(0, t),
>  				(b-t-lines)*mda_num_columns*2);
> -		scr_memsetw(MDA_ADDR(0,t), eattr, lines*mda_num_columns*2);
> +		scr_memsetw(mda_addr(0, t), eattr, lines*mda_num_columns*2);
>  		break;
>  	}
>