Re: [PATCH 1/2] KVM: remove CONFIG_KVM_GENERIC_MMU_NOTIFIER

[kernel test robot]

Hi Paolo,

kernel test robot noticed the following build errors:

[auto build test ERROR on kvm/queue]
[also build test ERROR on kvm/next kvms390/next next-20260212]
[cannot apply to powerpc/topic/ppc-kvm kvmarm/next linus/master kvm/linux-next v6.19]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Paolo-Bonzini/KVM-remove-CONFIG_KVM_GENERIC_MMU_NOTIFIER/20260212-185546
base:   https://git.kernel.org/pub/scm/virt/kvm/kvm.git queue
patch link:    https://lore.kernel.org/r/20260212105211.1555876-2-pbonzini%40redhat.com
patch subject: [PATCH 1/2] KVM: remove CONFIG_KVM_GENERIC_MMU_NOTIFIER
config: i386-buildonly-randconfig-002-20260212 (https://download.01.org/0day-ci/archive/20260213/202602130100.UiJclptY-lkp@xxxxxxxxx/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260213/202602130100.UiJclptY-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202602130100.UiJclptY-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

   arch/x86/kvm/../../../virt/kvm/kvm_main.c: In function 'kvm_init_mmu_notifier':
>> arch/x86/kvm/../../../virt/kvm/kvm_main.c:900:16: error: implicit declaration of function 'mmu_notifier_register'; did you mean 'mmu_notifier_release'? [-Wimplicit-function-declaration]
     900 |         return mmu_notifier_register(&kvm->mmu_notifier, current->mm);
         |                ^~~~~~~~~~~~~~~~~~~~~
         |                mmu_notifier_release
   arch/x86/kvm/../../../virt/kvm/kvm_main.c: In function 'kvm_create_vm':
>> arch/x86/kvm/../../../virt/kvm/kvm_main.c:1220:17: error: implicit declaration of function 'mmu_notifier_unregister'; did you mean 'preempt_notifier_unregister'? [-Wimplicit-function-declaration]
    1220 |                 mmu_notifier_unregister(&kvm->mmu_notifier, current->mm);
         |                 ^~~~~~~~~~~~~~~~~~~~~~~
         |                 preempt_notifier_unregister


vim +900 arch/x86/kvm/../../../virt/kvm/kvm_main.c

4c07b0a4b6df45 Avi Kivity 2009-12-20  896  
4c07b0a4b6df45 Avi Kivity 2009-12-20  897  static int kvm_init_mmu_notifier(struct kvm *kvm)
4c07b0a4b6df45 Avi Kivity 2009-12-20  898  {
4c07b0a4b6df45 Avi Kivity 2009-12-20  899  	kvm->mmu_notifier.ops = &kvm_mmu_notifier_ops;
4c07b0a4b6df45 Avi Kivity 2009-12-20 @900  	return mmu_notifier_register(&kvm->mmu_notifier, current->mm);
4c07b0a4b6df45 Avi Kivity 2009-12-20  901  }
4c07b0a4b6df45 Avi Kivity 2009-12-20  902  

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