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Date:   Mon, 19 Dec 2022 16:44:33 +0100
From:   Peter Zijlstra <peterz@infradead.org>
To:     Linus Torvalds <torvalds@linux-foundation.org>
Cc:     Nathan Chancellor <nathan@kernel.org>,
        Uros Bizjak <ubizjak@gmail.com>, x86@kernel.org,
        willy@infradead.org, akpm@linux-foundation.org,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        aarcange@redhat.com, kirill.shutemov@linux.intel.com,
        jroedel@suse.de
Subject: Re: [PATCH 11/13] x86_64: Remove pointless set_64bit() usage
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On Fri, Nov 04, 2022 at 10:15:08AM -0700, Linus Torvalds wrote:
> On Fri, Nov 4, 2022 at 9:01 AM Peter Zijlstra <peterz@infradead.org> wrote:
> >
> > So cmpxchg_double() does a cmpxchg on a double long value and is
> > currently supported by: i386, x86_64, arm64 and s390.
> >
> > On all those, except i386, two longs are u128.
> >
> > So how about we introduce u128 and cmpxchg128 -- then it directly
> > mirrors the u64 and cmpxchg64 usage we already have. It then also
> > naturally imposses the alignment thing.
> 
> Ack

Out now: https://lkml.kernel.org/r/20221219153525.632521981@infradead.org