linux-kernel - Re: [PATCH 06/10] drivers/pci: make host/pci-tegra.c explicitly non-modular

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Message-ID: <20151214081545.GB10055@ulmo.nvidia.com>
Date:	Mon, 14 Dec 2015 09:15:45 +0100
From:	Thierry Reding <thierry.reding@...il.com>
To:	Paul Gortmaker <paul.gortmaker@...driver.com>
Cc:	linux-kernel@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>,
	Stephen Warren <swarren@...dotorg.org>,
	Alexandre Courbot <gnurou@...il.com>,
	linux-tegra@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH 06/10] drivers/pci: make host/pci-tegra.c explicitly
 non-modular

On Sat, Dec 12, 2015 at 08:41:53PM -0500, Paul Gortmaker wrote:
> The Kconfig currently controlling compilation of this code is:
> 
> drivers/pci/host/Kconfig:config PCI_TEGRA
> drivers/pci/host/Kconfig:       bool "NVIDIA Tegra PCIe controller"
> 
> ...meaning that it currently is not being built as a module by anyone.
> 
> Lets remove the modular code that is essentially orphaned, so that
> when reading the driver there is no doubt it is builtin-only.
> 
> We don't have to disallow a driver unbind, since that is already
> done for us in this driver.
> 
> Since module_platform_driver() uses the same init level priority as
> builtin_platform_driver() the init ordering remains unchanged with
> this commit.
> 
> Also note that MODULE_DEVICE_TABLE is a no-op for non-modular code.
> 
> We also delete the MODULE_LICENSE tag etc. since all that information
> was (or is now) contained at the top of the file in the comments.
> 
> Cc: Thierry Reding <thierry.reding@...il.com>
> Cc: Bjorn Helgaas <bhelgaas@...gle.com>
> Cc: Stephen Warren <swarren@...dotorg.org>
> Cc: Alexandre Courbot <gnurou@...il.com>
> Cc: linux-tegra@...r.kernel.org
> Cc: linux-pci@...r.kernel.org
> Signed-off-by: Paul Gortmaker <paul.gortmaker@...driver.com>
> ---
>  drivers/pci/host/pci-tegra.c | 11 ++++-------
>  1 file changed, 4 insertions(+), 7 deletions(-)

I'd rather not do this. There is work underway to make it possible to
turn PCI host drivers into modules. I have a local tree with the
necessary changes and, though I suspect it might take a few releases to
get everything merged, I think we'll get there eventually.

Thierry

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