Subject: Re: linux-next: sparc tree build warning

From: Stephen Rothwell <[email-masked]>
Date: Thu, 28 Jan 2010 18:44:23 +1100

Hi Dave,

On Mon, 14 Dec 2009 16:33:38 +1100 Stephen Rothwell <[email-masked]> wrote:
>
> Today's linux-next build (sparc defconfig) produced this warning:
> 
> In file included from arch/sparc/include/asm/uaccess.h:7,
>                  from include/net/checksum.h:26,
>                  from include/linux/skbuff.h:29,
>                  from net/core/pktgen.c:141:
> In function 'copy_from_user',
>     inlined from 'pktgen_if_write' at net/core/pktgen.c:867:
> arch/sparc/include/asm/uaccess_32.h:276: warning: call to 'copy_from_user_overflow' declared with attribute warning: copy_from_user() buffer size is not provably correct
> 
> and many more.
> 
> The sparc64 defconfig build produced many similar warnings:
> 
> In file included from arch/sparc/include/asm/uaccess.h:5,
>                  from include/linux/uaccess.h:6,
>                  from include/linux/highmem.h:7,
>                  from include/linux/pagemap.h:11,
>                  from include/linux/mempolicy.h:63,
>                  from mm/mempolicy.c:69:
> arch/sparc/include/asm/uaccess_64.h: In function 'compat_sys_get_mempolicy':
> arch/sparc/include/asm/uaccess_64.h:232: warning: call to 'copy_from_user_overflow' declared with attribute warning: copy_from_user() buffer size is not provably correct

I am still seeing these.  Is it my compiler version (gcc4.4.0)?
-- 
Cheers,
Stephen Rothwell                    [email-masked]
http://www.canb.auug.org.au/~sfr/