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From: "H. Peter Anvin" <hpa@zytor.com>
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Subject: Re: [PATCH v10 6/7] x86/arch_prctl: Add ARCH_[GET|SET]_CPUID
To: Andy Lutomirski <luto@amacapital.net>
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<linux-fsdevel@vger.kernel.org>,"open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest@vger.kernel.org>,kvm list <kvm@vger.kernel.org>
From: hpa@zytor.com
Message-ID: <E47D06A9-AFDA-4A9D-8539-9CC5AB19B395@zytor.com>

On March 14, 2017 12:23:40 PM PDT, Andy Lutomirski <luto@amacapital.net> wrote:
>On Tue, Mar 14, 2017 at 12:01 PM, H. Peter Anvin <hpa@zytor.com> wrote:
>> and at least theoretically we
>> could be indirecting though the ->stack pointer for every one if gcc
>> can't tell it won't have changed (we really need to get thread_info
>> moved into the task_struct allocation and away from the kernel stack,
>> especially since on x86 the pointer is the same size as the vestigial
>> structure it points to.)
>
>Solved by use of time machine:
>
>commit 15f4eae70d365bba26854c90b6002aaabb18c8aa
>Author: Andy Lutomirski <luto@kernel.org>
>Date:   Tue Sep 13 14:29:25 2016 -0700
>
>    x86: Move thread_info into task_struct
>
>
>:)

My apologies, -ESTALEBRAINCACHE...
-- 
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