arch/arm/kvm/../../../virt/kvm/arm/arm.c:147:5: warning: no previous prototype for 'kvm_arch_create_vcpu_debugfs'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   1df0d8960499e58963fd6c8ac75e544f2b417b29
commit: 741cbbae0768b828be2d48331eb371a4f08bbea8 KVM: remove kvm_arch_has_vcpu_debugfs()
date:   11 months ago
config: arm-axm55xx_defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 741cbbae0768b828be2d48331eb371a4f08bbea8
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

>> arch/arm/kvm/../../../virt/kvm/arm/arm.c:147:5: warning: no previous prototype for 'kvm_arch_create_vcpu_debugfs' [-Wmissing-prototypes]
     147 | int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
         |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~

vim +/kvm_arch_create_vcpu_debugfs +147 arch/arm/kvm/../../../virt/kvm/arm/arm.c

749cf76c5a363e arch/arm/kvm/arm.c Christoffer Dall 2013-01-20  146  
235539b48a2357 arch/arm/kvm/arm.c Luiz Capitulino  2016-09-07 @147  int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu)
235539b48a2357 arch/arm/kvm/arm.c Luiz Capitulino  2016-09-07  148  {
235539b48a2357 arch/arm/kvm/arm.c Luiz Capitulino  2016-09-07  149  	return 0;
235539b48a2357 arch/arm/kvm/arm.c Luiz Capitulino  2016-09-07  150  }
235539b48a2357 arch/arm/kvm/arm.c Luiz Capitulino  2016-09-07  151  

:::::: The code at line 147 was first introduced by commit
:::::: 235539b48a2357da28f52d66d04bec04f3dcb9dd kvm: add stubs for arch specific debugfs support

:::::: TO: Luiz Capitulino <lcapitulino@xxxxxxxxxx>
:::::: CC: Paolo Bonzini <pbonzini@xxxxxxxxxx>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

Attachment: .config.gz
Description: application/gzip