linux-kernel - Re: Current kernel fails to compile with KVM on PowerPC

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Date:	Tue, 21 Feb 2012 09:32:13 +0100
From:	Jörg Sommer <joerg@...a.gnuu.de>
To:	Alexander Graf <agraf@...e.de>
Cc:	Avi Kivity <avi@...hat.com>, Marcelo Tosatti <mtosatti@...hat.com>,
	kvm list <kvm@...r.kernel.org>, kvm-ppc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: Current kernel fails to compile with KVM on PowerPC

Alexander Graf hat am Mon 20. Feb, 22:27 (+0100) geschrieben:
> On 20.02.2012, at 18:38, Jörg Sommer wrote:
> > Alexander Graf hat am Tue 22. Nov, 22:29 (+0100) geschrieben:
> >> On 22.11.2011, at 21:04, Jörg Sommer wrote:
> >>> [1] »kernel BUG at include/linux/kvm_host.h:603!«
> >>> http://www.mail-archive.com/kvm@vger.kernel.org/msg61433.html
> >> 
> >> This is unfortunately still there. It's because of preemption being
> >> enabled. Please just use CONFIG_PREEMPT_NONE for the time being
> > 
> > This doesn't help. I've build with CONFIG_PREEMPT_NONE, but I'm getting
> > this Oops, when I start qemu.
> 
> Could you please try git://git.kernel.org/pub/scm/virt/kvm/kvm.git? I
> fixed a bunch of things with preemption since then and it definitely
> worked for me. If it still fails in that tree, I can try again to
> reproduce it :).

This kernel (e9badff4b38a3f8b2c20aa8a30db210caf85a497) fails to build:

  CC [M]  arch/powerpc/kvm/book3s_pr.o
arch/powerpc/kvm/book3s_pr.c: In function ‘kvm_vcpu_ioctl_get_one_reg’:
arch/powerpc/kvm/book3s_pr.c:883:45: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
arch/powerpc/kvm/book3s_pr.c:883:80: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
arch/powerpc/kvm/book3s_pr.c:883:284: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
arch/powerpc/kvm/book3s_pr.c:883:327: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
arch/powerpc/kvm/book3s_pr.c:883:459: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
arch/powerpc/kvm/book3s_pr.c:883:748: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
arch/powerpc/kvm/book3s_pr.c:883:1112: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
arch/powerpc/kvm/book3s_pr.c:883:1476: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
arch/powerpc/kvm/book3s_pr.c:883:1867: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
arch/powerpc/kvm/book3s_pr.c: In function ‘kvm_vcpu_ioctl_set_one_reg’:
arch/powerpc/kvm/book3s_pr.c:898:79: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
arch/powerpc/kvm/book3s_pr.c:898:114: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
arch/powerpc/kvm/book3s_pr.c:898:319: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
arch/powerpc/kvm/book3s_pr.c:898:364: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
arch/powerpc/kvm/book3s_pr.c:898:502: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
arch/powerpc/kvm/book3s_pr.c:898:591: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
arch/powerpc/kvm/book3s_pr.c:898:2061: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
cc1: all warnings being treated as errors
make[3]: *** [arch/powerpc/kvm/book3s_pr.o] Fehler 1
make[2]: *** [arch/powerpc/kvm] Fehler 2
make[2]: *** Warte auf noch nicht beendete Prozesse...

Schöne Grüße, Jörg.
-- 
Manchmal denke ich, das sicherste Indiz dafür, daß anderswo im Universum
intelligentes Leben existiert, ist, daß niemand versucht hat, mit uns
Kontakt aufzunehmen.                           (Calvin und Hobbes)

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