linux-kernel - Re: [PATCH] x86/entry/64: Drop idtentry's manual stack switch for user entries

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Message-ID: <20180409162910.macimdsmka5ecfmm@gmail.com>
Date:   Mon, 9 Apr 2018 18:29:10 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     X86 ML <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
        Borislav Petkov <bp@...en8.de>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCH] x86/entry/64: Drop idtentry's manual stack switch for
 user entries


* Andy Lutomirski <luto@...nel.org> wrote:

> On Tue, Apr 3, 2018 at 3:39 PM, Andy Lutomirski <luto@...nel.org> wrote:
> > For non-paranoid entries, idtentry knows how to switch from the
> > kernel stack to the user stack, as does error_entry.  This results
> > in pointless duplication and code bloat.  Make idtentry stop
> > thinking about stacks for non-paranoid entries.
> >
> > This reduces text size by 5377 bytes.
> >
> 
> Just a quick ping to make sure you all noticed this.

LOL, incidentally I have applied it a couple of minutes ago! :-)

Thanks

	Ingo