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From: Kevin Winchester <kjwinchester@gmail.com>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>, 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
Subject: Re: [PATCH v4 0/5] x86: Cleanup and simplify cpu-specific data
Date: Thu, 1 Mar 2012 09:06:55 -0400	[thread overview]
Message-ID: <CAELBVzAPHfnZWRTU82V3yHuW9iY8SfAgDNmro1q4dpOvKTwnBg@mail.gmail.com> (raw)
In-Reply-To: <ad7809d2-4c66-4d55-929b-2c1ae76f1420@email.android.com>

On 28 February 2012 04:31, H. Peter Anvin <hpa@zytor.com> wrote:
> Better yet, fix the problem...
>

It appears that some attempts have been made at fixing this problem already:

https://lkml.org/lkml/2011/7/6/6
https://lkml.org/lkml/2011/7/7/480

So perhaps I can just turn off that config setting for now.  I'm going
away for a few days, but I'll try to fix up the patch series next
week.


> 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
>>

  reply	other threads:[~2012-03-01 13:06 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-02-23 23:57 [PATCH v4 0/5] x86: Cleanup and simplify cpu-specific data Kevin Winchester
2012-02-23 23:57 ` [PATCH v4 1/5] x86: Move per cpu cpu_llc_shared_map to a field in struct cpuinfo_x86 Kevin Winchester
2012-02-23 23:57 ` [PATCH v4 2/5] x86: Move per cpu cpu_llc_id " Kevin Winchester
2012-02-23 23:57 ` [PATCH v4 3/5] x86: Move per cpu cpu_sibling_map " Kevin Winchester
2012-02-23 23:57 ` [PATCH v4 4/5] x86: Move per cpu cpu_core_map " Kevin Winchester
2012-02-23 23:57 ` [PATCH v4 5/5] x86: Remove #ifdef CONFIG_SMP sections by moving smp_num_siblings into common.c Kevin Winchester
2012-02-24 11:47 ` [PATCH v4 0/5] x86: Cleanup and simplify cpu-specific data Borislav Petkov
2012-02-24 12:22   ` Kevin Winchester
2012-02-24 12:30     ` Borislav Petkov
2012-02-27 11:59 ` Ingo Molnar
2012-02-28  0:52   ` Kevin Winchester
2012-02-28  3:43     ` H. Peter Anvin
2012-02-28  8:24       ` Ingo Molnar
2012-02-28  8:31         ` H. Peter Anvin
2012-03-01 13:06           ` Kevin Winchester [this message]
2012-03-01 13:45             ` Ingo Molnar
2012-03-28 22:43   ` [PATCH v5 " Kevin Winchester
2012-03-28 22:43     ` [PATCH v5 1/5] x86: Move per cpu cpu_llc_shared_map to a field in struct cpuinfo_x86 Kevin Winchester
2012-03-28 22:43     ` [PATCH v5 2/5] x86: Move per cpu cpu_llc_id " Kevin Winchester
2012-03-28 22:43     ` [PATCH v5 3/5] x86: Move per cpu cpu_sibling_map " Kevin Winchester
2012-03-28 22:43     ` [PATCH v5 4/5] x86: Move per cpu cpu_core_map " Kevin Winchester
2012-03-28 22:43     ` [PATCH v5 5/5] x86: Remove #ifdef CONFIG_SMP sections by moving smp_num_siblings into common.c Kevin Winchester
2012-04-26 18:09     ` [PATCH v5 0/5] x86: Cleanup and simplify cpu-specific data Kevin Winchester
2012-04-26 19:48     ` H. Peter Anvin
     [not found]       ` <CAELBVzAi_yndZbDc0TkXhbqzn2wULpnsFMA_dop=Uvaii8tkqg@mail.gmail.com>
2012-04-26 21:21         ` H. Peter Anvin
2012-04-27 23:37           ` Kevin Winchester
2012-04-29 12:47             ` Borislav Petkov
2012-04-29 22:55               ` Kevin Winchester
2012-04-29 23:33           ` [PATCH v6 " Kevin Winchester
2012-04-29 23:33             ` [PATCH v6 1/5] x86: Move per cpu cpu_llc_shared_map to a field in struct cpuinfo_x86 Kevin Winchester
2012-04-29 23:37               ` H. Peter Anvin
2012-04-30 15:05                 ` Kevin Winchester
2012-05-07  8:32                   ` Ingo Molnar
2012-04-29 23:33             ` [PATCH v6 2/5] x86: Move per cpu cpu_llc_id " Kevin Winchester
2012-04-29 23:33             ` [PATCH v6 3/5] x86: Move per cpu cpu_sibling_map " Kevin Winchester
2012-04-29 23:33             ` [PATCH v6 4/5] x86: Move per cpu cpu_core_map " Kevin Winchester
2012-04-29 23:33             ` [PATCH v6 5/5] x86: Remove #ifdef CONFIG_SMP sections by moving smp_num_siblings into common.c Kevin Winchester

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