References: <1330041476-719-1-git-send-email-kjwinchester@gmail.com> <20120227115905.GB9943@elte.hu> <CAELBVzDQx-geNELEvHYheSL0hKbaXfUAvjperNcPELThT9bqWg@mail.gmail.com> <4F4C4D5C.70908@zytor.com> <20120228082422.GG21106@elte.hu>
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Subject: Re: [PATCH v4 0/5] x86: Cleanup and simplify cpu-specific data
From: "H. Peter Anvin" <hpa@zytor.com>
Date: Tue, 28 Feb 2012 00:31:02 -0800
To: Ingo Molnar <mingo@elte.hu>
CC: Kevin Winchester <kjwinchester@gmail.com>,
        Thomas Gleixner <tglx@linutronix.de>, Borislav Petkov <bp@alien8.de>,
        Randy Dunlap <rdunlap@xenotime.net>,
        Nick Bowler <nbowler@elliptictech.com>, linux-kernel@vger.kernel.org
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Better yet, fix the problem...

Ingo Molnar <mingo@elte.hu> wrote:

>
>* H. Peter Anvin <hpa@zytor.com> wrote:
>
>> >In function ‘copy_from_user’,
>> >     inlined from ‘pktgen_if_write’ at net/core/pktgen.c:877:20:
>>
>>/home/kevin/linux/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[2]: *** [net/core/pktgen.o] Error 1
>> >
>> >On:
>> >
>> >gcc (GCC) 4.6.2 20120120 (prerelease)
>> >
>> >Is that my fault, or something else?
>> >
>> >Kevin
>> >
>> 
>> That comes from compiling with warnings as errors.  Not that someone
>> shouldn't look at that kind of problem.
>
>Can probably be worked around by disabling:
>
>CONFIG_DEBUG_STRICT_USER_COPY_CHECKS
>
>Thanks,
>
>	Ingo

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