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From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Arnd Bergmann <arnd@kernel.org>
Cc: Richard Weinberger <richard@nod.at>,
	 Vignesh Raghavendra <vigneshr@ti.com>,
	 Nathan Chancellor <nathan@kernel.org>,
	 Arnd Bergmann <arnd@arndb.de>,
	 David Woodhouse <dwmw2@infradead.org>,
	 Nick Desaulniers <nick.desaulniers+lkml@gmail.com>,
	 Bill Wendling <morbo@google.com>,
	Justin Stitt <justinstitt@google.com>,
	 linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org,
	 llvm@lists.linux.dev
Subject: Re: [PATCH] mtd: dc21285: fix bytewise memcpy()
Date: Thu, 07 Aug 2025 09:54:38 +0200	[thread overview]
Message-ID: <87o6srd0sh.fsf@bootlin.com> (raw)
In-Reply-To: <20250807072044.4146480-1-arnd@kernel.org> (Arnd Bergmann's message of "Thu, 7 Aug 2025 09:20:34 +0200")

Hello Arnd,

On 07/08/2025 at 09:20:34 +02, Arnd Bergmann <arnd@kernel.org> wrote:

> From: Arnd Bergmann <arnd@arndb.de>
>
> The commit that split up the 8/16/32-bit operations in 2004 seems to have
> broken the 8-bit case, as clang-21 now points out:
>
> drivers/mtd/maps/dc21285.c:129:97: error: parameter 'len' set but not used [-Werror,-Wunused-but-set-parameter]
>   129 | static void dc21285_copy_to_8(struct map_info *map, unsigned long to, const void *from, ssize_t len)
>
> Put back the loop that was in linux-2.6.8 and earlier for this case.
>
> Fixes: 67d4878e4e61 ("NOR flash drivers update")
> Cc: David Woodhouse <dwmw2@infradead.org>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Thanks for the patch, I'll take it, but that probably means few to no
people still use it, if broken for more than 20 years...

Cheers,
Miquèl

______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

WARNING: multiple messages have this Message-ID (diff)
From: Miquel Raynal <miquel.raynal@bootlin.com>
To: Arnd Bergmann <arnd@kernel.org>
Cc: Richard Weinberger <richard@nod.at>,
	 Vignesh Raghavendra <vigneshr@ti.com>,
	 Nathan Chancellor <nathan@kernel.org>,
	 Arnd Bergmann <arnd@arndb.de>,
	 David Woodhouse <dwmw2@infradead.org>,
	 Nick Desaulniers <nick.desaulniers+lkml@gmail.com>,
	 Bill Wendling <morbo@google.com>,
	Justin Stitt <justinstitt@google.com>,
	 linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org,
	 llvm@lists.linux.dev
Subject: Re: [PATCH] mtd: dc21285: fix bytewise memcpy()
Date: Thu, 07 Aug 2025 09:54:38 +0200	[thread overview]
Message-ID: <87o6srd0sh.fsf@bootlin.com> (raw)
In-Reply-To: <20250807072044.4146480-1-arnd@kernel.org> (Arnd Bergmann's message of "Thu, 7 Aug 2025 09:20:34 +0200")

Hello Arnd,

On 07/08/2025 at 09:20:34 +02, Arnd Bergmann <arnd@kernel.org> wrote:

> From: Arnd Bergmann <arnd@arndb.de>
>
> The commit that split up the 8/16/32-bit operations in 2004 seems to have
> broken the 8-bit case, as clang-21 now points out:
>
> drivers/mtd/maps/dc21285.c:129:97: error: parameter 'len' set but not used [-Werror,-Wunused-but-set-parameter]
>   129 | static void dc21285_copy_to_8(struct map_info *map, unsigned long to, const void *from, ssize_t len)
>
> Put back the loop that was in linux-2.6.8 and earlier for this case.
>
> Fixes: 67d4878e4e61 ("NOR flash drivers update")
> Cc: David Woodhouse <dwmw2@infradead.org>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Thanks for the patch, I'll take it, but that probably means few to no
people still use it, if broken for more than 20 years...

Cheers,
Miquèl

  reply	other threads:[~2025-08-07  7:55 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-08-07  7:20 [PATCH] mtd: dc21285: fix bytewise memcpy() Arnd Bergmann
2025-08-07  7:20 ` Arnd Bergmann
2025-08-07  7:54 ` Miquel Raynal [this message]
2025-08-07  7:54   ` Miquel Raynal
2025-08-07 11:55   ` Arnd Bergmann
2025-08-07 11:55     ` Arnd Bergmann

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