[android-common:android15-6.6 0/1] arch/arm64/kvm/hyp/nvhe/iommu/iommu.c:175:6: warning: no previous prototype for 'kvm_iommu_donate_from_cma'

[android-common:android15-6.6 0/1] arch/arm64/kvm/hyp/nvhe/iommu/iommu.c:175:6: warning: no previous prototype for 'kvm_iommu_donate_from_cma'

[kernel test robot]

tree:   https://android.googlesource.com/kernel/common android15-6.6
head:   b7e7f27a0d8c205d665797cbe7db6a640417f73c
commit: 3f35c377b90d0692801bd74b5501e6dcf81e4900 [0/1] ANDROID: KVM: arm64: iommu: Allow donations from a CMA pool
config: arm64-defconfig (https://download.01.org/0day-ci/archive/20250118/202501182311.3pLSVMYS-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250118/202501182311.3pLSVMYS-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202501182311.3pLSVMYS-lkp@intel.com/

All warnings (new ones prefixed by >>):

   arch/arm64/kvm/hyp/nvhe/iommu/iommu.c:111:6: warning: no previous prototype for '__kvm_iommu_reclaim_pages' [-Wmissing-prototypes]
     111 | void __kvm_iommu_reclaim_pages(struct hyp_pool *pool, void *p, u8 order)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~
>> arch/arm64/kvm/hyp/nvhe/iommu/iommu.c:175:6: warning: no previous prototype for 'kvm_iommu_donate_from_cma' [-Wmissing-prototypes]
     175 | bool kvm_iommu_donate_from_cma(phys_addr_t phys, unsigned long order)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~
>> arch/arm64/kvm/hyp/nvhe/iommu/iommu.c:194:18: warning: no previous prototype for '__get_empty_block_pool' [-Wmissing-prototypes]
     194 | struct hyp_pool *__get_empty_block_pool(phys_addr_t phys)
         |                  ^~~~~~~~~~~~~~~~~~~~~~
>> arch/arm64/kvm/hyp/nvhe/iommu/iommu.c:215:6: warning: no previous prototype for '__repudiate_host_page' [-Wmissing-prototypes]
     215 | void __repudiate_host_page(void *addr, unsigned long order,
         |      ^~~~~~~~~~~~~~~~~~~~~
   arch/arm64/kvm/hyp/nvhe/iommu/iommu.c:222:5: warning: no previous prototype for 'kvm_iommu_refill' [-Wmissing-prototypes]
     222 | int kvm_iommu_refill(struct kvm_hyp_memcache *host_mc)
         |     ^~~~~~~~~~~~~~~~
   arch/arm64/kvm/hyp/nvhe/iommu/iommu.c:261:6: warning: no previous prototype for 'kvm_iommu_reclaim' [-Wmissing-prototypes]
     261 | void kvm_iommu_reclaim(struct kvm_hyp_memcache *host_mc, int target)
         |      ^~~~~~~~~~~~~~~~~
   arch/arm64/kvm/hyp/nvhe/iommu/iommu.c:292:5: warning: no previous prototype for 'kvm_iommu_reclaimable' [-Wmissing-prototypes]
     292 | int kvm_iommu_reclaimable(void)
         |     ^~~~~~~~~~~~~~~~~~~~~


vim +/kvm_iommu_donate_from_cma +175 arch/arm64/kvm/hyp/nvhe/iommu/iommu.c

   174	
 > 175	bool kvm_iommu_donate_from_cma(phys_addr_t phys, unsigned long order)
   176	{
   177		phys_addr_t end = phys + PAGE_SIZE * (1 << order);
   178	
   179		if (end <= phys)
   180			return false;
   181	
   182		if (order != pmd_order)
   183			return false;
   184	
   185		if (!IS_ALIGNED(phys, PMD_SIZE))
   186			return false;
   187	
   188		if (phys < cma_base || end > cma_base + cma_size)
   189			return false;
   190	
   191		return true;
   192	}
   193	
 > 194	struct hyp_pool *__get_empty_block_pool(phys_addr_t phys)
   195	{
   196		int p;
   197	
   198		for (p = 0; p < MAX_BLOCK_POOLS; p++) {
   199			struct hyp_pool *pool = &iommu_block_pools[p];
   200	
   201			if (pool->max_order)
   202				continue;
   203	
   204			if (hyp_pool_init(pool, hyp_phys_to_pfn(phys), 1 << pmd_order, 0))
   205				return NULL;
   206	
   207			WRITE_ONCE(__block_pools_available, 1);
   208	
   209			return pool;
   210		}
   211	
   212		return NULL;
   213	}
   214	
 > 215	void __repudiate_host_page(void *addr, unsigned long order,
   216				   struct kvm_hyp_memcache *host_mc)
   217	{
   218		push_hyp_memcache(host_mc, addr, hyp_virt_to_phys, order);
   219		WARN_ON(__pkvm_hyp_donate_host(hyp_virt_to_pfn(addr), 1 << order));
   220	}
   221	

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https://github.com/intel/lkp-tests/wiki