Re: [PATCH] signed char fixes for scripts

["J.A. Magallon" <jamagallon@able.es>]

On 07.27, Sam Ravnborg wrote:
> On Fri, Jul 15, 2005 at 10:14:43PM +0000, J.A. Magallon wrote:
> > 
> > On 07.16, J.A. Magallon wrote:
> > > 
> > > On 07.15, Andrew Morton wrote:
> > > > 
> > > > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.13-rc3/2.6.13-rc3-mm1/
> > > > 
> > 
> > This time I did not break anything... and they shut up gcc4 ;)
> 
> I have applied it to my tree. There still is a lot left when I compile
> with -Wsign-compare.
> 

All the problems are born here:

struct sym_entry {
    unsigned long long addr;
    unsigned int len;
    unsigned char *sym;
};

I suppose you want sym to be an unsigned char to store the type and to do
the checksum math in there.
And why use a 64bit address in 32bit archs ?. There is no math involved
with 'addr', so you can make it a pointer and let the compiler decide its
size.

Why don't you do something like:

struct sym_entry {
    void		*addr;
    unsigned char	type;
    unsigned short	len;
    union {
	unsigned char	data[KSYM_NAME_LEN+1];
	char		name[KSYM_NAME_LEN+1];
    };
};

Option b) is identify the five lines that do the checksum math and plague
them with (unsigned char) casts...
Will try to do it...

--
J.A. Magallon <jamagallon()able!es>     \               Software is like sex:
werewolf!able!es                         \         It's better when it's free
Mandriva Linux release 2006.0 (Cooker) for i586
Linux 2.6.12-jam10 (gcc 4.0.1 (4.0.1-0.2mdk for Mandriva Linux release 2006.0))


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