linux-kernel - Re: [PATCH -next 1/2] selftests: Fix vm_handle

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Date:   Sat, 14 Aug 2021 01:26:59 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Shuah Khan <skhan@...uxfoundation.org>,
        Chen Lifu <chenlifu@...wei.com>, shuah@...nel.org,
        bgardon@...gle.com, wangyanan55@...wei.com,
        axelrasmussen@...gle.com, drjones@...hat.com, seanjc@...gle.com,
        vkuznets@...hat.com, dwmw@...zon.co.uk, joao.m.martins@...cle.com,
        yangyingliang@...wei.com, kvm@...r.kernel.org,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next 1/2] selftests: Fix vm_handle_exception undefined
 error

On 13/08/21 19:01, Shuah Khan wrote:
> On 7/9/21 12:37 AM, Chen Lifu wrote:
>> Compile setftests on x86_64 occurs following error:
>> make -C tools/testing/selftests
>> ...
>>
>> x86_64/hyperv_features.c:618:2: warning: implicit declaration of 
>> function ‘vm_handle_exception’ [-Wimplicit-function-declaration]
>>    618 |  vm_handle_exception(vm, GP_VECTOR, guest_gp_handler);
>> /usr/bin/ld: /tmp/cclOnpml.o: in function `main':
>> tools/testing/selftests/kvm/x86_64/hyperv_features.c:618: undefined 
>> reference to `vm_handle_exception'
>> collect2: error: ld returned 1 exit status
>>
>> The reason is that commit b78f4a596692 ("KVM: selftests: Rename 
>> vm_handle_exception")
>> renamed "vm_handle_exception" function to 
>> "vm_install_exception_handler" function.
>>
>> Fix it by replacing "vm_handle_exception" with 
>> "vm_install_exception_handler"
>> in corresponding selftests files.
>>
>> Signed-off-by: Chen Lifu <chenlifu@...wei.com>
>> ---
>>   tools/testing/selftests/kvm/x86_64/hyperv_features.c | 2 +-
>>   tools/testing/selftests/kvm/x86_64/mmu_role_test.c   | 2 +-
>>   2 files changed, 2 insertions(+), 2 deletions(-)
>>
> 
> 
> Please include kvm in the commit summary. I think it is not getting
> the right attention because of the summary line.

The same patch was already committed:

     commit f8f0edabcc09fafd695ed2adc0eb825104e35d5c
     Author: Marc Zyngier <maz@...nel.org>
     Date:   Thu Jul 1 08:19:28 2021 +0100

     KVM: selftests: x86: Address missing vm_install_exception_handler conversions
     
     Commit b78f4a59669 ("KVM: selftests: Rename vm_handle_exception")
     raced with a couple of new x86 tests, missing two vm_handle_exception
     to vm_install_exception_handler conversions.
     
     Help the two broken tests to catch up with the new world.
     
     Cc: Andrew Jones <drjones@...hat.com>
     CC: Ricardo Koller <ricarkol@...gle.com>
     Cc: Paolo Bonzini <pbonzini@...hat.com>
     Signed-off-by: Marc Zyngier <maz@...nel.org>
     Message-Id: <20210701071928.2971053-1-maz@...nel.org>
     Reviewed-by: Andrew Jones <drjones@...hat.com>
     Reviewed-by: Ricardo Koller <ricarkol@...gle.com>
     Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>

For the other patch, returning 0 is going to cause issues elsewhere
in the tests.  Either the test is failed immediately, or all callers
must be examined carefully.

Paolo