linux-kernel - Re: linux-next: build failure after merge of the gpio tree

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Date:	Tue, 29 Jul 2014 10:42:38 +0200
From:	Thierry Reding <treding@...dia.com>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
CC:	Linus Walleij <linus.walleij@...aro.org>,
	Olof Johansson <olof@...om.net>, Arnd Bergmann <arnd@...db.de>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-next@...r.kernel.org" <linux-next@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: linux-next: build failure after merge of the gpio tree

On Tue, Jul 29, 2014 at 10:31:53AM +0200, Stephen Rothwell wrote:
> * PGP Signed by an unknown key
> 
> Hi Linus,
> 
> After merging the gpio tree, today's linux-next build (arm
> multi_v7_defconfig) failed like this:
> 
> In file included from arch/arm/mach-tegra/board-paz00.c:20:0:
> include/linux/gpio/machine.h:24:2: error: unknown type name 'u16'
>   u16 chip_hwnum;
>   ^
> include/linux/gpio/machine.h:31:19: error: field 'list' has incomplete type
>   struct list_head list;
>                    ^
> 
> Caused by commit 0a6d315827ee ("gpio: split gpiod board registration
> into machine header") or an interaction of that with commit
> a0524acc94c9 ("ARM: tegra: Sort includes alphabetically") from the
> arm-soc tree.
> 
> linux/gpio/machine.h needs to include some of the same files that
> linux/gpio/driver.h does.  See Rule 1 in Documentation/SubmitChecklist.
> 
> I have used the version of the gpio tree from next-20140728 for today.

I think linux/gpio/machine.h needs at least linux/types.h (for u16,
though I guess that "dependency" could be removed by simply making
gpiod_lookup.chip_hwnum an unsigned int) and linux/list.h for struct
list_head.

Thierry

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