[PATCH v1 3/6] soc: mediatek: virt: geniezone: Introduce GenieZone hypervisor support

[kernel test robot]

Hi Yi-De,

kernel test robot noticed the following build warnings:

[auto build test WARNING on robh/for-next]
[also build test WARNING on krzk-dt/for-next arm64/for-next/core lwn/docs-next linus/master v6.3-rc6 next-20230412]
[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/Yi-De-Wu/docs-geniezone-Introduce-GenieZone-hypervisor/20230413-170932
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/20230413090735.4182-4-yi-de.wu%40mediatek.com
patch subject: [PATCH v1 3/6] soc: mediatek: virt: geniezone: Introduce GenieZone hypervisor support
config: arm64-allyesconfig (https://download.01.org/0day-ci/archive/20230413/202304132051.wGFK08qz-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 12.1.0
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
        # https://github.com/intel-lab-lkp/linux/commit/2d01949ddd48b1bc2cc9849154afe60781068f39
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Yi-De-Wu/docs-geniezone-Introduce-GenieZone-hypervisor/20230413-170932
        git checkout 2d01949ddd48b1bc2cc9849154afe60781068f39
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/soc/mediatek/virt/geniezone/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp at intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304132051.wGFK08qz-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/soc/mediatek/virt/geniezone/gzvm_vm.c:31:5: warning: no previous prototype for 'gzvm_gfn_to_pfn_memslot' [-Wmissing-prototypes]
      31 | int gzvm_gfn_to_pfn_memslot(struct gzvm_memslot *memslot, u64 gfn, u64 *pfn)
         |     ^~~~~~~~~~~~~~~~~~~~~~~


vim +/gzvm_gfn_to_pfn_memslot +31 drivers/soc/mediatek/virt/geniezone/gzvm_vm.c

    19	
    20	
    21	/**
    22	 * @brief Translate gfn (guest ipa) to pfn (host pa), result is in @pfn
    23	 *
    24	 * Leverage KVM's `gfn_to_pfn_memslot`. Because `gfn_to_pfn_memslot` needs
    25	 * kvm_memory_slot as parameter, this function populates necessary fileds
    26	 * for calling `gfn_to_pfn_memslot`.
    27	 *
    28	 * @retval 0 succeed
    29	 * @retval -EFAULT failed to convert
    30	 */
  > 31	int gzvm_gfn_to_pfn_memslot(struct gzvm_memslot *memslot, u64 gfn, u64 *pfn)
    32	{
    33		hfn_t __pfn;
    34		struct kvm_memory_slot kvm_slot = {0};
    35	
    36		kvm_slot.base_gfn = memslot->base_gfn;
    37		kvm_slot.npages = memslot->npages;
    38		kvm_slot.dirty_bitmap = NULL;
    39		kvm_slot.userspace_addr = memslot->userspace_addr;
    40		kvm_slot.flags = memslot->flags;
    41		kvm_slot.id = memslot->slot_id;
    42		kvm_slot.as_id = 0;
    43	
    44		__pfn = gfn_to_pfn_memslot(&kvm_slot, gfn);
    45		if (is_error_noslot_pfn(__pfn)) {
    46			*pfn = 0;
    47			return -EFAULT;
    48		}
    49	
    50		*pfn = __pfn;
    51		return 0;
    52	}
    53	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests