linux-kernel - Re: [PATCH 00/11] Add support for RaspberryPi RP1 PCI device using a DT overlay

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Message-ID: <ZtWDpaqUG9d9yPPf@apocalypse>
Date: Mon, 2 Sep 2024 11:21:41 +0200
From: Andrea della Porta <andrea.porta@...e.com>
To: Andrew Lunn <andrew@...n.ch>
Cc: Andrea della Porta <andrea.porta@...e.com>,
	Krzysztof Kozlowski <krzk@...nel.org>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Derek Kiernan <derek.kiernan@....com>,
	Dragan Cvetic <dragan.cvetic@....com>,
	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Nicolas Ferre <nicolas.ferre@...rochip.com>,
	Claudiu Beznea <claudiu.beznea@...on.dev>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Saravana Kannan <saravanak@...gle.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>, linux-clk@...r.kernel.org,
	devicetree@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-gpio@...r.kernel.org, netdev@...r.kernel.org,
	linux-pci@...r.kernel.org, linux-arch@...r.kernel.org,
	Lee Jones <lee@...nel.org>, Stefan Wahren <wahrenst@....net>
Subject: Re: [PATCH 00/11] Add support for RaspberryPi RP1 PCI device using a
 DT overlay

Hi Andrew,

On 16:10 Fri 30 Aug     , Andrew Lunn wrote:
> > On a second thought, are you really sure we want to proceed with the header file?
> > After all the only line in it would be the extern declaration and the only one to
> > include it would be rp1-dev.c. Moreover, an header file would convey the false
> > premise that you can include it and use that symbol while in fact it should be
> > only used inside the driver.
> > OTOH, not creating that header file will continue to trigger the warning...
> 
> The header file does not need to be in global scope. It could be in
> the driver source directory. As such, nothing outside of the driver
> can use it.

Ack.

> 
> Headers like this have multiple proposes. One is they make a symbol
> visible to the linker. But having two different .c files include the

Hmm... not sure what second file is including it, since only rp1_pci.c needs it.

> header enables type checking, which for long term maintenance is just
> as important. So a one line header is fine.

Done.

Cheers,
Andrea

> 
> 	Andrew
>