Re: [PATCH] [prefetch.h] warning: pointer of type `void *' used inarithmetic'

[Andrew Morton]

Vojtech Pavlik <vojtech@xxxxxxx> wrote:
>
> On Sat, Jul 03, 2004 at 05:18:11PM -0700, Andrew Morton wrote:
> > Pawe__ Sikora <pluto@xxxxxxxxxxxxx> wrote:
> > >
> > > warning killed.
> > 
> > >  --- /var/tmp/linux/include/linux/prefetch.h.orig	2004-06-16 07:20:25.000000000 +0200
> > >  +++ /var/tmp/linux/include/linux/prefetch.h	2004-07-03 18:28:10.478861720 +0200
> > >  @@ -59,7 +59,7 @@
> > >   {
> > >   #ifdef ARCH_HAS_PREFETCH
> > >   	char *cp;
> > >  -	char *end = addr + len;
> > >  +	char *end = (char *)addr + len;
> > 
> > What version of the compiler is generating this warning?
> 
> As far as I know, any gcc if and only if you pass "-Wpointer-arith" to
> it. The kernel doesn't do that, leaving me wondering ...
> 

This discussion fell off the mailing list (grr).

The warning was encountered when building the nvidia driver, and it indeed
uses -Wpointer-arith.
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