Re: [PATCH v1 4/4] KVM: PPC: Book3S HV: migrate hot plugged memory

Hi Ram,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on powerpc/next]
[also build test ERROR on v5.7]
[cannot apply to next-20200529]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Ram-Pai/Migrate-non-migrated-pages-of-a-SVM/20200601-034649
base:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-defconfig (attached as .config)
compiler: powerpc64-linux-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
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <redacted>

All errors (new ones prefixed by >>, old ones prefixed by <<):

arch/powerpc/kvm/book3s_64_mmu_radix.c:345:6: error: no previous prototype for 'kvmppc_radix_set_pte_at' [-Werror=missing-prototypes]
345 | void kvmppc_radix_set_pte_at(struct kvm *kvm, unsigned long addr,
|      ^~~~~~~~~~~~~~~~~~~~~~~
In file included from arch/powerpc/kvm/book3s_64_mmu_radix.c:23:

quoted

arch/powerpc/include/asm/kvm_book3s_uvmem.h:89:12: error: 'uv_migrate_mem_slot' declared 'static' but never defined [-Werror=unused-function]

89 | static int uv_migrate_mem_slot(struct kvm *kvm,
|            ^~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

vim +89 arch/powerpc/include/asm/kvm_book3s_uvmem.h

    83	
    84	static inline void
    85	kvmppc_uvmem_drop_pages(const struct kvm_memory_slot *free,
    86				struct kvm *kvm, bool skip_page_out,
    87				bool purge_gfn) { }
    88	
  > 89	static int uv_migrate_mem_slot(struct kvm *kvm,

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