linux-kernel - Re: [PATCH] parisc: Remove memcpy

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Message-ID: <61390496-2066-4b9f-bf1f-235d29b64135@gmx.de>
Date: Mon, 3 Feb 2025 19:39:46 +0100
From: Helge Deller <deller@....de>
To: Arnd Bergmann <arnd@...db.de>, Julian Vetter <julian@...er-limits.org>,
 "James E . J . Bottomley" <James.Bottomley@...senpartnership.com>
Cc: linux-parisc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] parisc: Remove memcpy_fromio

On 1/31/25 08:28, Arnd Bergmann wrote:
> On Thu, Jan 30, 2025, at 14:48, Julian Vetter wrote:
>> Fully migrate parisc to the IO functions from lib/iomem_copy.c. In a
>> recent patch the functions memset_io and memcpy_toio were removed, but
>> the memcpy_fromio was kept, because for very short sequences it does
>> half word accesses, whereas the functions in lib/iomem_copy.c do byte
>> accesses until the memory is naturally aligned and then do machine word
>> accesses. But I don't think the single half-word access merits keeping
>> the arch specific implementation, so, remove it as well.
>>
>> Signed-off-by: Julian Vetter <julian@...er-limits.org>
>
> Acked-by: Arnd Bergmann <arnd@...db.de>

Thanks!
I've added the patch to the parisc git tree.

Helge