[PATCH] Fix warning in prefetch_range

[PATCH] Fix warning in prefetch_range

[Brian Gerst]

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Fix this warning:
include/linux/prefetch.h: In function `prefetch_range':
include/linux/prefetch.h:62: warning: pointer of type `void *' used in 
arithmetic

--
				Brian Gerst

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diff -urN linux-2.6.5-rc1-bk/include/linux/prefetch.h linux/include/linux/prefetch.h
--- linux-2.6.5-rc1-bk/include/linux/prefetch.h	2004-04-14 23:53:11.000000000 -0400
+++ linux/include/linux/prefetch.h	2004-04-16 11:12:25.840194048 -0400
@@ -59,7 +59,7 @@
 {
 #ifdef ARCH_HAS_PREFETCH
 	char *cp;
-	char *end = addr + len;
+	char *end = (char *)addr + len;
 
 	for (cp = addr; cp < end; cp += PREFETCH_STRIDE)
 		prefetch(cp);

Re: [PATCH] Fix warning in prefetch_range

[Andrew Morton]

Brian Gerst <bgerst@didntduck.org> wrote:
>
> Fix this warning:
> include/linux/prefetch.h: In function `prefetch_range':
> include/linux/prefetch.h:62: warning: pointer of type `void *' used in 
> arithmetic
> 

eh?  That's a gcc extension which has worked silently since forever.

What compiler version is generating the warning?

Re: [PATCH] Fix warning in prefetch_range

[Brian Gerst]

Andrew Morton wrote:
> Brian Gerst <bgerst@didntduck.org> wrote:
> 
>>Fix this warning:
>>include/linux/prefetch.h: In function `prefetch_range':
>>include/linux/prefetch.h:62: warning: pointer of type `void *' used in 
>>arithmetic
>>
> 
> 
> eh?  That's a gcc extension which has worked silently since forever.
> 
> What compiler version is generating the warning?
> 

gcc (GCC) 3.3.3 20040412 (Red Hat Linux 3.3.3-7)

I saw the warning when compiling the nvidia driver, which uses 
-Wpointer-arith.  I'll drop that switch instead.

--
				Brian Gerst