linux-kernel - Re: [Intel-gfx] [PATCH v5 0/7] Introduce _

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Date: Fri, 5 Apr 2024 18:20:11 +0200
From: Andrzej Hajda <andrzej.hajda@...el.com>
To: Jani Nikula <jani.nikula@...ux.intel.com>,
 Peter Zijlstra <peterz@...radead.org>
Cc: Mark Rutland <mark.rutland@....com>, linux-ia64@...r.kernel.org,
 linux-sh@...r.kernel.org, dri-devel@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org, sparclinux@...r.kernel.org,
 linux-riscv@...ts.infradead.org, linux-s390@...r.kernel.org,
 linux-hexagon@...r.kernel.org, linux-snps-arc@...ts.infradead.org,
 intel-gfx@...ts.freedesktop.org, linux-xtensa@...ux-xtensa.org,
 Arnd Bergmann <arnd@...db.de>, Boqun Feng <boqun.feng@...il.com>,
 linux-m68k@...ts.linux-m68k.org, openrisc@...ts.librecores.org,
 loongarch@...ts.linux.dev, Rodrigo Vivi <rodrigo.vivi@...el.com>,
 Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
 linux-arm-kernel@...ts.infradead.org, linux-parisc@...r.kernel.org,
 linux-mips@...r.kernel.org, linux-alpha@...r.kernel.org,
 Andrew Morton <akpm@...ux-foundation.org>, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [Intel-gfx] [PATCH v5 0/7] Introduce __xchg, non-atomic xchg



On 05.04.2024 16:47, Jani Nikula wrote:
> On Mon, 27 Feb 2023, Peter Zijlstra <peterz@...radead.org> wrote:
>> On Thu, Feb 23, 2023 at 10:24:19PM +0100, Andrzej Hajda wrote:
>>> On 22.02.2023 18:04, Peter Zijlstra wrote:
>>>> On Wed, Jan 18, 2023 at 04:35:22PM +0100, Andrzej Hajda wrote:
>>>>
>>>>> Andrzej Hajda (7):
>>>>>     arch: rename all internal names __xchg to __arch_xchg
>>>>>     linux/include: add non-atomic version of xchg
>>>>>     arch/*/uprobes: simplify arch_uretprobe_hijack_return_addr
>>>>>     llist: simplify __llist_del_all
>>>>>     io_uring: use __xchg if possible
>>>>>     qed: use __xchg if possible
>>>>>     drm/i915/gt: use __xchg instead of internal helper
>>>> Nothing crazy in here I suppose, I somewhat wonder why you went through
>>>> the trouble, but meh.
>>> If you are asking why I have proposed this patchset, then the answer is
>>> simple, 1st I've tried to find a way to move internal i915 helper to core
>>> (see patch 7).
>>> Then I was looking for possible other users of this helper. And apparently
>>> there are many of them, patches 3-7 shows some.
>>>
>>>
>>>> You want me to take this through te locking tree (for the next cycle,
>>>> not this one) where I normally take atomic things or does someone else
>>>> want this?
>>> If you could take it I will be happy.
>> OK, I'll go queue it in tip/locking/core after -rc1. Thanks!
> Is this where the series fell between the cracks, or was there some
> follow-up that I missed?
>
> I think this would still be useful. Andrzej, would you mind rebasing and
> resending if there are no objections?

The patchset was rejected/dropped by Linus at the pull-request stage.
He didn't like many things, but the most __xchg name. However he was 
quite positive about i915 name fetch_and_zero.
I can try to revive patchset with fetch_and_zero, and maybe 
fetch_and_set, instead of __xchg.

Regards
Andrzej

>
> BR,
> Jani.
>
>