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From: Paolo Bonzini <pbonzini@redhat.com>
To: kbuild test robot <lkp@intel.com>,
	Sean Christopherson <sean.j.christopherson@intel.com>
Cc: kbuild-all@01.org, kvm@vger.kernel.org,
	Robert Hu <robert.hu@intel.com>,
	Farrah Chen <farrah.chen@intel.com>,
	Danmei Wei <danmei.wei@intel.com>
Subject: Re: [kvm:queue 104/105] vmx.c:undefined reference to `__udivdi3'
Date: Tue, 18 Jun 2019 12:56:48 +0200	[thread overview]
Message-ID: <467292fe-c1ee-0430-22af-b13cd9cbc559@redhat.com> (raw)
In-Reply-To: <201906180411.jzFP0qva%lkp@intel.com>

On 17/06/19 22:20, kbuild test robot wrote:
> tree:   https://git.kernel.org/pub/scm/virt/kvm/kvm.git queue
> head:   5253b5b578e40c3a10922579b38d1a53112324bd
> commit: ce70de9a05de4510435f554da0cb2fb3321ba0fc [104/105] KVM: VMX: Leave preemption timer running when it's disabled
> config: i386-allyesconfig (attached as .config)
> compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
> reproduce:
>         git checkout ce70de9a05de4510435f554da0cb2fb3321ba0fc
>         # save the attached .config to linux build tree
>         make ARCH=i386 
> 
> If you fix the issue, kindly add following tag
> Reported-by: kbuild test robot <lkp@intel.com>
> 
> All errors (new ones prefixed by >>):
> 
>    ld: arch/x86/kvm/vmx/vmx.o: in function `hardware_setup':
>>> vmx.c:(.init.text+0xe90): undefined reference to `__udivdi3'

Fixed by rewriting

	if ((0xffffffffu / use_timer_freq) < 10)
		enable_preemption_timer = false;

to

	if (use_timer_freq > 0xffffffffu / 10)
		enable_preemption_timer = false;

(finally doing inequations in high school paid off).

Paolo

      reply	other threads:[~2019-06-18 10:56 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-17 20:20 [kvm:queue 104/105] vmx.c:undefined reference to `__udivdi3' kbuild test robot
2019-06-18 10:56 ` Paolo Bonzini [this message]

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