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	Fri, 11 Oct 2024 07:49:17 +0000
Date: Fri, 11 Oct 2024 00:49:17 -0700
From: Christoph Hellwig <hch@infradead.org>
To: Julian Vetter <jvetter@kalrayinc.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>, Guo Ren <guoren@kernel.org>,
	Huacai Chen <chenhuacai@kernel.org>,
	WANG Xuerui <kernel@xen0n.name>,
	Andrew Morton <akpm@linux-foundation.org>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	Richard Henderson <richard.henderson@linaro.org>,
	Niklas Schnelle <schnelle@linux.ibm.com>,
	Takashi Iwai <tiwai@suse.com>,
	Miquel Raynal <miquel.raynal@bootlin.com>,
	David Laight <David.Laight@aculab.com>,
	Johannes Berg <johannes@sipsolutions.net>,
	Christoph Hellwig <hch@infradead.org>,
	linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
	linux-csky@vger.kernel.org, loongarch@lists.linux.dev,
	linux-arch@vger.kernel.org, Yann Sionneau <ysionneau@kalrayinc.com>
Subject: Re: [PATCH v9 1/4] Consolidate IO memcpy/memset into iomem_copy.c
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References: <20241010123627.695191-1-jvetter@kalrayinc.com>
 <20241010123627.695191-2-jvetter@kalrayinc.com>
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On Thu, Oct 10, 2024 at 02:36:24PM +0200, Julian Vetter wrote:
> Various architectures have almost the same implementations for
> memcpy_{to,from}io and memset_io functions. So, consolidate them
> into a common lib/iomem_copy.c.

That might be the final intent of this seris, but what this patch does is
to replace the trivial memset/memcpy inline implementations with a more 
complex one that actually use the accessors.

So this actually changes behavior for those architectures that did not
provide them before quite a lot.  You'll need to explain in more
detail why that is safe and desireable.