linux-kernel - Re: [PATCH v4 05/17] module: Switch load_info::len to size

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Message-ID: <ffdafd21-fe7a-44a2-86ec-0e0c2ad4238c@kernel.org>
Date: Fri, 6 Feb 2026 10:09:12 +0100
From: "Christophe Leroy (CS GROUP)" <chleroy@...nel.org>
To: Thomas Weißschuh <linux@...ssschuh.net>,
 Nathan Chancellor <nathan@...nel.org>, Arnd Bergmann <arnd@...db.de>,
 Luis Chamberlain <mcgrof@...nel.org>, Petr Pavlu <petr.pavlu@...e.com>,
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Cc: Fabian Grünbichler <f.gruenbichler@...xmox.com>,
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Subject: Re: [PATCH v4 05/17] module: Switch load_info::len to size_t

Le 13/01/2026 à 13:28, Thomas Weißschuh a écrit :
> Switching the types will make some later changes cleaner.
> size_t is also the semantically correct type for this field.
> 
> As both 'size_t' and 'unsigned int' are always the same size, this
> should be risk-free.

Are you sure ?

Some architectures have size_t as 'unsigned int', some have 'unsigned 
long', some have 'unsigned long long'

https://elixir.bootlin.com/linux/v6.19-rc5/source/arch/s390/include/uapi/asm/posix_types.h#L16
https://elixir.bootlin.com/linux/v6.19-rc5/source/arch/sparc/include/uapi/asm/posix_types.h#L35
https://elixir.bootlin.com/linux/v6.19-rc5/source/arch/xtensa/include/uapi/asm/posix_types.h#L26
https://elixir.bootlin.com/linux/v6.19-rc5/source/include/uapi/asm-generic/posix_types.h#L68
https://elixir.bootlin.com/linux/v6.19-rc5/source/include/uapi/asm-generic/posix_types.h#L72
https://elixir.bootlin.com/linux/v6.19-rc5/source/arch/sparc/include/uapi/asm/posix_types.h#L23
https://elixir.bootlin.com/linux/v6.19-rc5/source/arch/x86/include/uapi/asm/posix_types_x32.h#L15
https://elixir.bootlin.com/linux/v6.19-rc5/source/include/uapi/asm-generic/posix_types.h#L16

Christophe