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From: Linus Torvalds <torvalds@linux-foundation.org>
To: Uros Bizjak <ubizjak@gmail.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	Russell King <linux@armlinux.org.uk>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
	Heiko Carstens <hca@linux.ibm.com>
Cc: "the arch/x86 maintainers" <x86@kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Waiman.Long@hp.com, Paul McKenney <paulmck@linux.vnet.ibm.com>
Subject: Re: [PATCH 1/2] locking/lockref: Use try_cmpxchg64 in CMPXCHG_LOOP macro
Date: Thu, 26 May 2022 09:56:19 -0700	[thread overview]
Message-ID: <CAHk-=wg1xKLV3aWWvp46295yFkAnzxv3pmehoHk6RuEwB0pa_Q@mail.gmail.com> (raw)
In-Reply-To: <CAHk-=wh1XeaxWXG5QziGA4ds918UnW1hO924kusgVB-wGj+9Og@mail.gmail.com>

On Wed, May 25, 2022 at 9:47 AM Linus Torvalds
<torvalds@linux-foundation.org> wrote:
>
> Ack on this one regardless of the 32-bit x86 question.

.. and with confirmation from Michael and Mark (and the analysis from
Uros on the fallback code), I've applied this to my tree.

NOTE!

I have *not* applied the second patch with the x86-32 change to enable
this on 32-bit with CMPXCHG8B enabled. I think that's independent, and
will leave it up to the x86 maintainers.  Plus I think the patch
should be simplified.

             Linus

  parent reply	other threads:[~2022-05-26 16:56 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-25 14:40 [PATCH 0/2] locking/lockref: Use try_cmpxchg64 in CMPXCHG_LOOP macro Uros Bizjak
2022-05-25 14:40 ` [PATCH 1/2] " Uros Bizjak
2022-05-25 16:47   ` Linus Torvalds
2022-05-26  8:54     ` Uros Bizjak
2022-05-26 12:14     ` Michael Ellerman
2022-05-26 12:14       ` Michael Ellerman
2022-05-26 12:42       ` Mark Rutland
2022-05-26 12:42         ` Mark Rutland
2022-05-27  9:36         ` Heiko Carstens
2022-05-27  9:36           ` Heiko Carstens
2022-05-26 16:52       ` Linus Torvalds
2022-05-26 16:52         ` Linus Torvalds
2022-05-26 16:56     ` Linus Torvalds [this message]
2022-05-25 14:40 ` [PATCH 2/2] locking/lockref/x86: Enable ARCH_USE_CMPXCHG_LOCKREF for X86_32 && X86_CMPXCHG64 Uros Bizjak
2022-05-25 16:29   ` Linus Torvalds
2022-05-26  8:30     ` David Laight
2022-05-26  9:12       ` Uros Bizjak
2022-05-26 17:23       ` Linus Torvalds

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