linux-kernel - Re: [PATCH 1/2] KVM: Fix the build error

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Date:   Mon, 21 Sep 2020 08:23:09 +0800
From:   Haiwei Li <lihaiwei.kernel@...il.com>
To:     Paolo Bonzini <pbonzini@...hat.com>, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, x86@...nel.org
Cc:     sean.j.christopherson@...el.com, vkuznets@...hat.com,
        wanpengli@...cent.com, jmattson@...gle.com, joro@...tes.org,
        tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, hpa@...or.com,
        lihaiwei@...cent.com, kernel test robot <lkp@...el.com>
Subject: Re: [PATCH 1/2] KVM: Fix the build error



On 20/9/20 21:09, Paolo Bonzini wrote:
> On 14/09/20 11:11, lihaiwei.kernel@...il.com wrote:
>> From: Haiwei Li <lihaiwei@...cent.com>
>>
>> When CONFIG_SMP is not set, an build error occurs with message "error:
>> use of undeclared identifier 'kvm_send_ipi_mask_allbutself'"
>>
>> Fixes: 0f990222108d ("KVM: Check the allocation of pv cpu mask", 2020-09-01)
>> Reported-by: kernel test robot <lkp@...el.com>
>> Signed-off-by: Haiwei Li <lihaiwei@...cent.com>
>> ---
>>   arch/x86/kernel/kvm.c | 2 ++
>>   1 file changed, 2 insertions(+)
>>
>> diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
>> index 1b51b727b140..7e8be0421720 100644
>> --- a/arch/x86/kernel/kvm.c
>> +++ b/arch/x86/kernel/kvm.c
>> @@ -797,7 +797,9 @@ static __init int kvm_alloc_cpumask(void)
>>   			}
>>   		}
>>   
>> +#if defined(CONFIG_SMP)
>>   	apic->send_IPI_mask_allbutself = kvm_send_ipi_mask_allbutself;
>> +#endif
>>   	pv_ops.mmu.flush_tlb_others = kvm_flush_tlb_others;
>>   	return 0;
>>   
>>
> 
> If CONFIG_SMP is not set you don't need kvm_alloc_cpumask or
> pv_ops.mmu.flush_tlb_others at all.  Can you squash these two into the
> original patch and re-submit for 5.10?

I will, thanks.

Haiwei Li