linux-kernel - Re: [PATCH] fix warnings from vgaarb.h

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Date:	Wed, 04 Apr 2012 07:46:18 -0700
From:	Randy Dunlap <rdunlap@...otime.net>
To:	Meelis Roos <mroos@...ux.ee>
CC:	Clemens Ladisch <clemens@...isch.de>,
	Dave Airlie <airlied@...hat.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Linux Kernel list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] fix warnings from vgaarb.h

On 04/04/2012 12:00 AM, Meelis Roos wrote:
>> Meelis Roos wrote:
>>> in 3.4-rc1-144, I get the following warnings. Fix them by including
>>> <linux/pci.h>  to get struct pci_dev.
>>>
>>>    CC [M]  drivers/gpu/drm/i915/intel_display.o
>>> In file included from drivers/gpu/drm/i915/intel_display.c:33:0:
>>> include/linux/vgaarb.h:66:9: warning: ‘struct pci_dev’ declared inside parameter list [enabled by default]
>>
>> Or you could simply declare it:
>>
>>    struct pci_dev;
>
> Right, but any actual user of vgaarb would still need real pci_dev
> anyway. But yes, nothing in vgaarb.h uses pci_dev contents, so the
> following also compiles without warnings:
>
> -
>
> in 3.4-rc1-144, I get several warnings like this
>
>    CC [M]  drivers/gpu/drm/i915/intel_display.o
> In file included from drivers/gpu/drm/i915/intel_display.c:33:0:
> include/linux/vgaarb.h:66:9: warning: ‘struct pci_dev’ declared inside parameter list [enabled by default]
>
> Fix them by forward declaring struct pci_dev:
>
> Signed-off-by: Meelis Roos<mroos@...ux.ee>
>
> diff --git a/include/linux/vgaarb.h b/include/linux/vgaarb.h
> index 9c3120d..b572f80 100644
> --- a/include/linux/vgaarb.h
> +++ b/include/linux/vgaarb.h
> @@ -47,6 +47,8 @@
>    */
>   #define VGA_DEFAULT_DEVICE     (NULL)
>
> +struct pci_dev;
> +
>   /* For use by clients */
>
>   /**
> '
>

Yes, I have sent this same patch at least 2 times, beginning on 
Jan-30-2012.  And I cc-ed dri-devel mailing list and Dave Airlie
on it also.

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