linux-kernel - Re: [PATCH] fbcon: replace mono

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Date:	Tue, 26 Feb 2008 09:18:03 +0100 (CET)
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Harvey Harrison <harvey.harrison@...il.com>
cc:	Antonino Daplas <adaplas@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux Frame Buffer Device Development 
	<linux-fbdev-devel@...ts.sourceforge.net>
Subject: Re: [PATCH] fbcon: replace mono_col macro with static inline

On Mon, 25 Feb 2008, Harvey Harrison wrote:
> Use __u32 for max_len to match the declaration of length in the
> struct fb_bitfield.
> 
> Suppresses sparse shadowed variable warnings from the nested max()
> macros:
> drivers/video/console/fbcon.h:130:8: warning: symbol '_x' shadows an earlier one
> drivers/video/console/fbcon.h:130:8: originally declared here
> drivers/video/console/fbcon.h:130:8: warning: symbol '_x' shadows an earlier one
> drivers/video/console/fbcon.h:130:8: originally declared here
> drivers/video/console/fbcon.h:130:8: warning: symbol '_y' shadows an earlier one
> drivers/video/console/fbcon.h:130:8: originally declared here
> 
> Signed-off-by: Harvey Harrison <harvey.harrison@...il.com>
> ---
>  drivers/video/console/fbcon.h |   12 ++++++++----
>  1 files changed, 8 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/video/console/fbcon.h b/drivers/video/console/fbcon.h
> index 3706307..51a6bf4 100644
> --- a/drivers/video/console/fbcon.h
> +++ b/drivers/video/console/fbcon.h
> @@ -104,10 +104,14 @@ struct fbcon_ops {
>  #define attr_blink(s) \
>  	((s) & 0x8000)
>  	
> -#define mono_col(info)							\
> -	(~(0xfff << (max((info)->var.green.length,			\
> -			 max((info)->var.red.length,			\
> -			     (info)->var.blue.length)))) & 0xff)
> +
> +static inline int mono_col(struct fb_info *info)
                              ^^^^^^^^^^^^^^^^^^^^
const struct fb_info *info?

> +{
> +	__u32 max_len;
> +	max_len = max(info->var.green.length, info->var.red.length);
> +	max_len = max(info->var.blue.length, max_len);
> +	return ~(0xfff << (max_len & 0xff));
> +}
>  
>  static inline int attr_col_ec(int shift, struct vc_data *vc,
>  			      struct fb_info *info, int is_fg)

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds
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