Re: [PATCH] fix sparse problems with ARRAY_SIZE

[Adel Gadllah <adel.gadllah@gmail.com>]

Al Viro wrote:
> On Tue, Jul 10, 2007 at 09:58:18PM +0100, Al Viro wrote:
>   
> > On Tue, Jul 10, 2007 at 11:40:33PM +0400, Alexey Dobriyan wrote:
> >     
> > > On Tue, Jul 10, 2007 at 06:09:48PM +0200, Adel Gadllah wrote:
> > >       
> > > > --- linux-2.6.orig/include/linux/kernel.h
> > > > +++ linux-2.6/include/linux/kernel.h
> > > > @@ -35,7 +35,11 @@ extern const char linux_proc_banner[];
> > > >  #define ALIGN(x,a)		__ALIGN_MASK(x,(typeof(x))(a)-1)
> > > >  #define __ALIGN_MASK(x,mask)	(((x)+(mask))&~(mask))
> > > >  
> > > > +#ifdef __CHECKER_
> > > > +#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
> > > > +#else
> > > >  #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
> > > > +#endif
> > > >         
> > > Al Viro recently gave a hint that he have patches for sparse to not give
> > > spurious ARRAY_SIZE warnings.
> > >       
> > I do.  Right now it's either 2 or 4 patches away from mainline sparse,
> > depending on reordering...  I'm splitting the last patch in series,
> > hopefully will reorder and send tonight.
> >
> > Basically, it's a matter of getting __builtin_compatible_types_p()
> > implementation (really - evaluate.c:type_difference()) somewhere sane.
> >     
>
> Try git://git.kernel.org/pub/scm/linux/kernel/git/viro/sparse.git/,
> the branch is type_difference
>
>   
ok a proper fix is always better than a workaround ;)
it seems that ARRAY_SIZE is defined multiple times....
seem wrong... shouldn't all users include linux/kernel.h and use that one?
-
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