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Re: [PATCH 2/9] x86: Add support for rd/wr fs/gs base

From Andi Kleen <andi@firstfloor.org>
Newsgroups linux.kernel
Subject Re: [PATCH 2/9] x86: Add support for rd/wr fs/gs base
Date 2016-03-21 23:20 +0100
Message-ID <rfgl4-3uK-19@gated-at.bofh.it> (permalink)
References <rfaIF-8aj-3@gated-at.bofh.it> <rfaIG-8aj-31@gated-at.bofh.it> <rfcAO-Zv-25@gated-at.bofh.it> <rfgbn-3qY-1@gated-at.bofh.it> <rfgbo-3qY-17@gated-at.bofh.it>
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On Mon, Mar 21, 2016 at 03:08:46PM -0700, Andy Lutomirski wrote:
> On Mon, Mar 21, 2016 at 3:05 PM, Andi Kleen <andi@firstfloor.org> wrote:
> >> Please add a patch before this one that renames gs to gsbase.  This is
> >> unreadable as is.
> >
> > I investigated this now, and it's not straight forward because on 32bit
> > ->gs is actually gsindex, not gsbase. So with a straight rename you
> > would end up with index in base on 32bit, which would be confusing.
> >
> 
> I would take this inconsistency as a reason why this needs to be fixed
> before any further changes are made.

The patchkit doesn't change anything for 32bit, so any inconsistency
in 32bit is completely orthogonal.

I don't see how adding a bazillion unrelated changes makes this
patchkit any better.

> 
> The variables should be called "gsbase" and "gsindex", full stop.
> It's not particularly risky -- we could even compare the generated
> code if we cared.

Iff you can catch all the ifdefs ... 
I looked through the grep hits and I don't think it's straight forward.

-Andi

-- 
ak@linux.intel.com -- Speaking for myself only.

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Thread

[PATCH 2/9] x86: Add support for rd/wr fs/gs base Andi Kleen <andi@firstfloor.org> - 2016-03-21 17:20 +0100
  Re: [PATCH 2/9] x86: Add support for rd/wr fs/gs base Andy Lutomirski <luto@amacapital.net> - 2016-03-21 19:20 +0100
    Re: [PATCH 2/9] x86: Add support for rd/wr fs/gs base Andi Kleen <andi@firstfloor.org> - 2016-03-21 20:30 +0100
      Re: [PATCH 2/9] x86: Add support for rd/wr fs/gs base Andy Lutomirski <luto@amacapital.net> - 2016-03-21 20:30 +0100
    Re: [PATCH 2/9] x86: Add support for rd/wr fs/gs base Andi Kleen <andi@firstfloor.org> - 2016-03-21 23:10 +0100
      Re: [PATCH 2/9] x86: Add support for rd/wr fs/gs base Andy Lutomirski <luto@amacapital.net> - 2016-03-21 23:10 +0100
        Re: [PATCH 2/9] x86: Add support for rd/wr fs/gs base Andi Kleen <andi@firstfloor.org> - 2016-03-21 23:20 +0100
          Re: [PATCH 2/9] x86: Add support for rd/wr fs/gs base Thomas Gleixner <tglx@linutronix.de> - 2016-03-22 09:40 +0100
          Re: [PATCH 2/9] x86: Add support for rd/wr fs/gs base Brian Gerst <brgerst@gmail.com> - 2016-03-22 15:50 +0100

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