From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: linux-next: sparc tree build warning
Date: Sun, 13 Dec 2009 23:40:36 -0800 (PST)
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References: <20091214163338.f811722f.sfr@canb.auug.org.au>
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From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Mon, 14 Dec 2009 16:33:38 +1100

>     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

BTW, you should be getting the same exact warnings on x86
32-bit with gcc-4.4 or later.