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Re: [Xen-devel] [PATCH] xen: remove incorrect forward declaration

Started byDavid Vrabel <david.vrabel@citrix.com>
First post2016-05-26 12:40 +0200
Last post2016-05-28 00:00 +0200
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  Re: [Xen-devel] [PATCH] xen: remove incorrect forward declaration David Vrabel <david.vrabel@citrix.com> - 2016-05-26 12:40 +0200
    Re: [Xen-devel] [PATCH] xen: remove incorrect forward declaration Arnd Bergmann <arnd@arndb.de> - 2016-05-28 00:00 +0200

#1407506 — Re: [Xen-devel] [PATCH] xen: remove incorrect forward declaration

FromDavid Vrabel <david.vrabel@citrix.com>
Date2016-05-26 12:40 +0200
SubjectRe: [Xen-devel] [PATCH] xen: remove incorrect forward declaration
Message-ID<rD0RQ-5hu-23@gated-at.bofh.it>
On 11/05/16 14:07, Arnd Bergmann wrote:
> A bugfix patch for the xen balloon driver introduced a forward
> declaration for a static function that is conditionally compiled,
> causing a warning if only the declaration but not the definition
> are there:
> 
> drivers/xen/balloon.c:154:13: error: 'release_memory_resource' declared 'static' but never defined [-Werror=unused-function]
>  static void release_memory_resource(struct resource *resource);
> 
> This removes the declaration again and instead moves the function
> definition to the right place, before its first caller and inside
> of the #ifdef protecting both.

I've applied the equivalent patch from Ross, instead.

> The patch that introduced the warning is marked for stable
> backports, so if that gets applied to 4.4, so should this one.

Fixes for compiler warnings are not sufficiently important to be
backported to stable.

David

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#1408331

FromArnd Bergmann <arnd@arndb.de>
Date2016-05-28 00:00 +0200
Message-ID<rDxXs-ni-17@gated-at.bofh.it>
In reply to#1407506
On Thursday, May 26, 2016 11:32:40 AM CEST David Vrabel wrote:
> On 11/05/16 14:07, Arnd Bergmann wrote:
> > A bugfix patch for the xen balloon driver introduced a forward
> > declaration for a static function that is conditionally compiled,
> > causing a warning if only the declaration but not the definition
> > are there:
> > 
> > drivers/xen/balloon.c:154:13: error: 'release_memory_resource' declared 'static' but never defined [-Werror=unused-function]
> >  static void release_memory_resource(struct resource *resource);
> > 
> > This removes the declaration again and instead moves the function
> > definition to the right place, before its first caller and inside
> > of the #ifdef protecting both.
> 
> I've applied the equivalent patch from Ross, instead.

Ok, thanks.

> > The patch that introduced the warning is marked for stable
> > backports, so if that gets applied to 4.4, so should this one.
> 
> Fixes for compiler warnings are not sufficiently important to be
> backported to stable.

Sure, but this is not an existing warning but one that only gets
introduced after the other patch gets backported, which I'd consider
a different category.

	Arnd

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