Re: Some cleanup patches for: '...lvalues is deprecated'

[Vojtech Pavlik <vojtech@suse.cz>]

On Sat, Jul 03, 2004 at 12:53:21PM +0000, Joel Soete wrote:
> Hi Marcelo,
> 
> Please appolgies first for wrong presentation of previous post (that was 
> the first and certainly the last time that I used the 'forwarding' option 
> of this webmail interface :( ).
> 
> Here are some backport to clean up some warning of type: use of cast 
> experssion
> as lvalues is deprecated.
> --- linux-2.4.27-rc2-pa4mm/kernel/sysctl.c.Orig	2004-06-29 
> 09:03:42.000000000 +0200
> +++ linux-2.4.27-rc2-pa4mm/kernel/sysctl.c	2004-06-29 
> 10:10:31.588030256 +0200
> @@ -890,7 +890,7 @@
>  				if (!isspace(c))
>  					break;
>  				left--;
> -				((char *) buffer)++;
> +				buffer += sizeof(char);

This (although correct in the end) is a wrong thing to do.

It seems to look like the intention is to move the pointer by a char's
size, however your change is equivalent to:

	buffer += 1;

And if buffer wasn't void*, which it fortunately is, it would, unlike
the older construction, move the pointer by a different size.

So just use

	buffer++;

here, and the intent is then clear.

> --- linux-2.4.27-rc2-pa4mm/drivers/video/fbcon.c.Orig	2004-06-29 
> 10:47:31.901491304 +0200
> +++ linux-2.4.27-rc2-pa4mm/drivers/video/fbcon.c	2004-06-29 
> 11:13:31.846343640 +0200
> @@ -1877,7 +1877,10 @@
>         font length must be multiple of 256, at least. And 256 is multiple
>         of 4 */
>      k = 0;
> -    while (p > new_data) k += *--(u32 *)p;
> +    while (p > new_data) {
> +        p = (u8 *)((u32 *)p - 1);
> +        k += *(u32 *)p;
> +    }


How about

	p -= 4;
	k += *(u32 *)p;

-- 
Vojtech Pavlik
SuSE Labs, SuSE CR