linux-kernel - Re: [PATCH] ARM: fix memset64() on big-endian

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Message-Id: <bfd7776e-574a-4828-99a2-f70a3b9015e6@app.fastmail.com>
Date: Fri, 02 Jan 2026 10:24:33 +0100
From: "Arnd Bergmann" <arnd@...db.de>
To: Thomas Weißschuh <thomas.weissschuh@...utronix.de>,
 "Russell King" <linux@...linux.org.uk>,
 "Andrew Morton" <akpm@...ux-foundation.org>,
 "Matthew Wilcox" <willy@...radead.org>
Cc: "Russell King" <rmk+kernel@...linux.org.uk>,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 stable@...r.kernel.org
Subject: Re: [PATCH] ARM: fix memset64() on big-endian

On Fri, Jan 2, 2026, at 08:15, Thomas Weißschuh wrote:
> On big-endian systems the 32-bit low and high halves need to be swapped,
> for the underlying assembly implemenation to work correctly.
>
> Fixes: fd1d362600e2 ("ARM: implement memset32 & memset64")
> Cc: stable@...r.kernel.org
> Signed-off-by: Thomas Weißschuh <thomas.weissschuh@...utronix.de>
> ---
> Found by the string_test_memset64 KUnit test.

Good catch! I guess that likely means you are the first one to
run kunit test on armbe since the tests got added. Did you find
any other differences between BE and LE kernels running kunit?

Reviewed-by: Arnd Bergmann <arnd@...db.de>