linux-kernel - Re: [PATCH 4.4 00/37] 4.4.110-stable review

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Message-ID: <alpine.DEB.2.20.1801112157390.2091@nanos>
Date:   Thu, 11 Jan 2018 22:32:25 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
cc:     Pavel Tatashin <pasha.tatashin@...cle.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andy Lutomirski <luto@...nel.org>,
        Hugh Dickins <hughd@...gle.com>, Thomas Voegtle <tv@...96.de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Shuah Khan <shuahkh@....samsung.com>, patches@...nelci.org,
        Ben Hutchings <ben.hutchings@...ethink.co.uk>,
        lkft-triage@...ts.linaro.org, stable <stable@...r.kernel.org>,
        Steve Sistare <steven.sistare@...cle.com>,
        Matt Fleming <matt@...eblueprint.co.uk>,
        Borislav Petkov <bp@...en8.de>
Subject: Re: [PATCH 4.4 00/37] 4.4.110-stable review

On Thu, 11 Jan 2018, Linus Torvalds wrote:

> On Thu, Jan 11, 2018 at 12:37 PM, Thomas Gleixner <tglx@...utronix.de> wrote:
> >
> > 67a9108ed431 ("x86/efi: Build our own page table structures")
> >
> > got rid of EFI depending on real_mode_header->trampoline_pgd
> 
> So I think it only got rid of by default - the codepath is still
> there, the allocation is still there, it's just that it's not actually
> used unless somebody does that "efi=old_mmap" thing.

Yes, the trampoline_pgd is still around, but I can't figure out how it
would be used after boot. Confused, digging more.

Thanks,

	tglx