linux-kernel - Re: [PATCH 0/2] Restrict module namespace to in-tree modules and rename macro

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Message-ID: <20250708-merkmal-erhitzen-23e7e9daa150@brauner>
Date: Tue, 8 Jul 2025 09:40:37 +0200
From: Christian Brauner <brauner@...nel.org>
To: Vlastimil Babka <vbabka@...e.cz>
Cc: Matthias Maennich <maennich@...gle.com>, 
	Jonathan Corbet <corbet@....net>, Luis Chamberlain <mcgrof@...nel.org>, 
	Petr Pavlu <petr.pavlu@...e.com>, Sami Tolvanen <samitolvanen@...gle.com>, 
	Daniel Gomez <da.gomez@...sung.com>, Masahiro Yamada <masahiroy@...nel.org>, 
	Nathan Chancellor <nathan@...nel.org>, Nicolas Schier <nicolas.schier@...ux.dev>, 
	Alexander Viro <viro@...iv.linux.org.uk>, Jan Kara <jack@...e.cz>, Christoph Hellwig <hch@...radead.org>, 
	Peter Zijlstra <peterz@...radead.org>, David Hildenbrand <david@...hat.com>, 
	Shivank Garg <shivankg@....com>, "Jiri Slaby (SUSE)" <jirislaby@...nel.org>, 
	Stephen Rothwell <sfr@...b.auug.org.au>, linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-modules@...r.kernel.org, linux-kbuild@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 0/2] Restrict module namespace to in-tree modules and
 rename macro

On Tue, Jul 08, 2025 at 09:28:56AM +0200, Vlastimil Babka wrote:
> Christian asked [1] for EXPORT_SYMBOL_FOR_MODULES() without the _GPL_
> part to avoid controversy converting selected existing EXPORT_SYMBOL().
> Christoph argued [2] that the _FOR_MODULES() export is intended for
> in-tree modules and thus GPL is implied anyway and can be simply dropped
> from the export macro name. Peter agreed [3] about the intention for
> in-tree modules only, although nothing currently enforces it.
> 
> It seems straightforward to add this enforcement, so patch 1 does that.
> Patch 2 then drops the _GPL_ from the name and so we're left with
> EXPORT_SYMBOL_FOR_MODULES() restricted to in-tree modules only.
> 
> Current -next has some new instances of EXPORT_SYMBOL_GPL_FOR_MODULES()
> in drivers/tty/serial/8250/8250_rsa.c by commit b20d6576cdb3 ("serial:
> 8250: export RSA functions"). Hopefully it's resolvable by a merge
> commit fixup and we don't need to provide a temporary alias.
> 
> [1] https://lore.kernel.org/all/20250623-warmwasser-giftig-ff656fce89ad@brauner/
> [2] https://lore.kernel.org/all/aFleJN_fE-RbSoFD@infradead.org/
> [3] https://lore.kernel.org/all/20250623142836.GT1613200@noisy.programming.kicks-ass.net/
> 
> Signed-off-by: Vlastimil Babka <vbabka@...e.cz>
> ---

Love this. It'd be great to get this in as a bugfix,
Acked-by: Christian Brauner <brauner@...nel.org>