linux-kernel - Re: [PATCH 1/8] kbuild, PCI: generic,versatile: comment out MODULE

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Date:   Fri, 10 Feb 2023 11:36:16 -0600
From:   Rob Herring <robh@...nel.org>
To:     Nick Alcock <nick.alcock@...cle.com>
Cc:     mcgrof@...nel.org, linux-modules@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/8] kbuild, PCI: generic,versatile: comment out
 MODULE_LICENSE in non-modules

On Fri, Feb 10, 2023 at 11:05 AM Nick Alcock <nick.alcock@...cle.com> wrote:
>
> Since commit 8b41fc4454e ("kbuild: create modules.builtin without
> Makefile.modbuiltin or tristate.conf"), MODULE_LICENSE declarations
> are used to identify modules. As a consequence, uses of the macro
> in non-modules will cause modprobe to misidentify their containing
> object file as a module when it is not (false positives), and modprobe
> might succeed rather than failing with a suitable error message.

How is there an issue when any given module could be built-in instead?

The general trend is to make all PCI host drivers modules, the primary
reason this one, IIRC, is not a module is because it is missing
remove() hook to de-init the PCI bus. Not too hard to add, but I
wanted to do a common devm hook to do that instead of an explicit
.remove() hook in each driver. I suppose we could just ignore that and
allow building as a module. Unloading is optional anyways.

> So comment out all uses of MODULE_LICENSE that are not in real modules

That's a comment for the series more than just this patch.

> (the license declaration is left in as documentation).
>
> Signed-off-by: Nick Alcock <nick.alcock@...cle.com>
> Suggested-by: Luis Chamberlain <mcgrof@...nel.org>
> Cc: Luis Chamberlain <mcgrof@...nel.org>
> Cc: linux-modules@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Cc: Rob Herring <robh@...nel.org>
> Cc: linux-pci@...r.kernel.org
> Cc: linux-arm-kernel@...ts.infradead.org
> ---
>  drivers/pci/controller/pci-versatile.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)