linux-kernel - Re: [PATCH] <linux/of_platform.h>: fix compilation warnings with DT disabled

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Message-ID: <20130301070925.GA24369@verge.net.au>
Date:	Fri, 1 Mar 2013 16:09:25 +0900
From:	Simon Horman <horms@...ge.net.au>
To:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Cc:	grant.likely@...retlab.ca, rob.herring@...xeda.com,
	devicetree-discuss@...ts.ozlabs.org,
	vladimir.barinov@...entembedded.com, linux-sh@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] <linux/of_platform.h>: fix compilation warnings with DT
 disabled

On Tue, Feb 19, 2013 at 02:58:25AM +0300, Sergei Shtylyov wrote:
> Fix the following compilation warnings (in Simon Horman's renesas.git repo):
> 
> In file included from arch/arm/mach-shmobile/setup-r8a7779.c:24:0:
> include/linux/of_platform.h:107:13: warning: ‘struct of_device_id’ declared
> inside parameter list [enabled by default]
> include/linux/of_platform.h:107:13: warning: its scope is only this definition
> or declaration, which is probably not what you want [enabled by default]
> include/linux/of_platform.h:107:13: warning: ‘struct device_node’ declared
> inside parameter list [enabled by default]
> 
> <linux/of_platform.h> only #include's headers with definitions of the above
> mentioned structures if CONFIG_OF_DEVICE=y but uses them even if not. One
> solution is to move some #include's out of #ifdef CONFIG_OF_DEVICE and use
> incomplete declarations for the rest of the structures where the #ifdef move
> doesn't help...
> 
> Reported-by: Vladimir Barinov <vladimir.barinov@...entembedded.com>
> Signed-off-by: Sergei Shtylyov <sergei.shtylyov@...entembedded.com>

Reviewed-by: Simon Horman <horms+renesas@...ge.net.au>

Grant, could you consider taking this patch?

> ---
> Actually, it compiles eve without 'struct device_node' declared, I haven't
> found the reason of this, so left it there...
> 
>  include/linux/of_platform.h |    5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> Index: linux/include/linux/of_platform.h
> ===================================================================
> --- linux.orig/include/linux/of_platform.h
> +++ linux/include/linux/of_platform.h
> @@ -11,9 +11,10 @@
>   *
>   */
>  
> -#ifdef CONFIG_OF_DEVICE
>  #include <linux/device.h>
>  #include <linux/mod_devicetable.h>
> +
> +#ifdef CONFIG_OF_DEVICE
>  #include <linux/pm.h>
>  #include <linux/of_device.h>
>  #include <linux/platform_device.h>
> @@ -100,7 +101,7 @@ extern int of_platform_populate(struct d
>  
>  #if !defined(CONFIG_OF_ADDRESS)
>  struct of_dev_auxdata;
> -struct device;
> +struct device_node;
>  static inline int of_platform_populate(struct device_node *root,
>  					const struct of_device_id *matches,
>  					const struct of_dev_auxdata *lookup,
> --
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