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Date: Mon, 20 Aug 2018 15:04:23 -0700
From: Andi Kleen <andi@firstfloor.org>
Subject: Re: [PATCH] x86/mm: Simplify p[g4um]d_page() macros
Message-ID: <20180820220422.7qrayn7wivmejr24@two.firstfloor.org>
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To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andi Kleen <andi@firstfloor.org>, stable <stable@vger.kernel.org>, Andi Kleen <ak@linux.intel.com>, Tom Lendacky <thomas.lendacky@amd.com>, Alexander Potapenko <glider@google.com>, Andrey Ryabinin <aryabinin@virtuozzo.com>, Andrew Lutomirski <luto@kernel.org>, Arnd Bergmann <arnd@arndb.de>, Borislav Petkov <bp@alien8.de>, Brijesh Singh <brijesh.singh@amd.com>, Dave Young <dyoung@redhat.com>, Dmitry Vyukov <dvyukov@google.com>, Jonathan Corbet <corbet@lwn.net>, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>, Larry Woodman <lwoodman@redhat.com>, Matt Fleming <matt@codeblueprint.co.uk>, "Michael S. Tsirkin" <mst@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, Peter Zijlstra <peterz@infradead.org>, Radim =?utf-8?B?S3LEjW3DocWZ?= <rkrcmar@redhat.com>, Rik van Riel <riel@redhat.com>, Toshi Kani <toshi.kani@hpe.com>, kasan-dev <kasan-dev@googlegroups.com>, KVM list <kvm@vger.kernel.org>, linux-arch <linux-arch@vger.kernel.org>, "open list:DOCUMENTATION" <linux-doc@vger.kernel.org>, linux-efi <linux-efi@vger.kernel.org>, linux-mm <linux-mm@kvack.org>, Ingo Molnar <mingo@kernel.org>

On Mon, Aug 20, 2018 at 02:57:39PM -0700, Linus Torvalds wrote:
> On Mon, Aug 20, 2018 at 1:37 PM Andi Kleen <andi@firstfloor.org> wrote:
> >
> > From: Andi Kleen <ak@linux.intel.com>
> >
> > Create a pgd_pfn() macro similar to the p[4um]d_pfn() macros and then
> > use the p[g4um]d_pfn() macros in the p[g4um]d_page() macros instead of
> > duplicating the code.
> 
> When doing backports, _please_ explicitly specify which commit this is
> upstream too.

Ok.

> 
> Also, the original upstream patch is credited to Tom Lendacky.

Okay.

> 
> Or is there something I'm not seeing, and this is different from
> commit fd7e315988b7 ("x86/mm: Simplify p[g4um]d_page() macros")?

No it's Tom's patch just ported to the older tree with some minor
changes. I just fat fingered it while doing the commit

-Andi