linux-kernel - Re: linux-next: build failure after merge of the final tree (kvm-ppc tree related)

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Date:	Thu, 19 Apr 2012 22:14:13 -0300
From:	Marcelo Tosatti <mtosatti@...hat.com>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
Cc:	Avi Kivity <avi@...hat.com>, linux-next@...r.kernel.org,
	linux-kernel@...r.kernel.org, Eric B Munson <emunson@...bm.net>,
	Alexander Graf <agraf@...e.de>
Subject: Re: linux-next: build failure after merge of the final tree (kvm-ppc
 tree related)

On Fri, Apr 20, 2012 at 10:10:12AM +1000, Stephen Rothwell wrote:
> Hi all,
> 
> On Thu, 19 Apr 2012 16:35:35 +1000 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> >
> > After merging the final tree, today's linux-next build (sparc64 defconfig)
> > failed like this:
> > 
> > In file included from kernel/watchdog.c:27:0:
> > include/linux/kvm_para.h: In function 'kvm_para_has_feature':
> > include/linux/kvm_para.h:32:2: error: implicit declaration of function 'kvm_arch_para_features' [-Werror=implicit-function-declaration]
> > 
> > Caused by commit 5d1c0f4a80a6 ("watchdog: add check for suspended vm in
> > softlockup detector").  This build has no KVM related CONFIG options set.
> > 
> > I have reverted that commit for today.
> 
> This build failure now belongs to the kvm tree ...
> 
> -- 
> Cheers,
> Stephen Rothwell                    sfr@...b.auug.org.au


Stephen,

Can you try the patch below please?



KVM: add kvm_arch_para_features stub to asm-generic/kvm_para.h

Needed by kvm_para_has_feature().

Reported-by: Stephen Rothwell <sfr@...b.auug.org.au>

diff --git a/include/asm-generic/kvm_para.h b/include/asm-generic/kvm_para.h
index 05ef7e7..9a7bbad 100644
--- a/include/asm-generic/kvm_para.h
+++ b/include/asm-generic/kvm_para.h
@@ -11,4 +11,9 @@ static inline bool kvm_check_and_clear_guest_paused(void)
 	return false;
 }
 
+static inline unsigned int kvm_arch_para_features(void)
+{
+	return 0;
+}
+
 #endif
--
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