linux-kernel - Re: [PATCH 0/4] x86: FPU detection in C

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Date:	Wed, 10 Apr 2013 14:24:11 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	"H. Peter Anvin" <hpa@...or.com>, X86 ML <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>, Borislav Petkov <bp@...e.de>
Subject: Re: [PATCH 0/4] x86: FPU detection in C

On Wed, Apr 10, 2013 at 01:08:40PM +0200, Ingo Molnar wrote:
> Config attached.

How do you even build this? I tried tip:x86/cpu but it fails here:

drivers/misc/lkdtm.c: In function ‘recursive_loop.constprop.3’:
drivers/misc/lkdtm.c:276:1: warning: the frame size of 1028 bytes is larger than 1024 bytes [-Wframe-larger-than=]
In file included from /w/kernel/linux-2.6/arch/x86/include/asm/uaccess.h:537:0,
                 from include/linux/uaccess.h:5,
                 from include/linux/highmem.h:8,
                 from include/linux/pagemap.h:10,
                 from fs/binfmt_misc.c:27:
/w/kernel/linux-2.6/arch/x86/include/asm/uaccess_32.h: In function ‘parse_command.part.2’:
/w/kernel/linux-2.6/arch/x86/include/asm/uaccess_32.h:211:26: error: call to ‘copy_from_user_overflow’ declared with attribute error: copy_from_user() buffer size is not provably correct
make[1]: *** [fs/binfmt_misc.o] Error 1
make[1]: *** Waiting for unfinished jobs....
make: *** [fs] Error 2
make: *** Waiting for unfinished jobs....

because of CONFIG_DEBUG_STRICT_USER_COPY_CHECKS=y.

Thanks.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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