[vireshk:virtio/msg-xen 10/18] drivers/virtio/virtio_msg_ffa_dma_ops.c:42:27: error: incompatible integer to pointer conversion passing 'u64' (aka 'unsigned long long') to parameter of type 'const void *'

[kernel test robot <lkp@intel.com>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/vireshk/linux.git virtio/msg-xen
head:   2fb1132cbfed1f9c19ee5b9856411f6da4558a51
commit: e454cdc8078f8c9be4e91ffe41adb1fa22ec96ee [10/18] virtio-msg: Add DMA OPs support
config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20241213/202412130650.ysV9xfoZ-lkp@intel.com/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241213/202412130650.ysV9xfoZ-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/202412130650.ysV9xfoZ-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/virtio/virtio_msg_ffa_dma_ops.c:42:27: error: incompatible integer to pointer conversion passing 'u64' (aka 'unsigned long long') to parameter of type 'const void *' [-Wint-conversion]
      42 |                 pages[i] = virt_to_page((u64)vaddr + PAGE_SIZE * i);
         |                            ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/arm64/include/asm/memory.h:409:50: note: expanded from macro 'virt_to_page'
     409 | #define virt_to_page(x)         pfn_to_page(virt_to_pfn(x))
         |                                 ~~~~~~~~~~~~~~~~~~~~~~~~^~~
   include/asm-generic/memory_model.h:37:40: note: expanded from macro '__pfn_to_page'
      37 | #define __pfn_to_page(pfn)      (vmemmap + (pfn))
         |                                             ^~~
   arch/arm64/include/asm/memory.h:382:53: note: passing argument to parameter 'kaddr' here
     382 | static inline unsigned long virt_to_pfn(const void *kaddr)
         |                                                     ^
   drivers/virtio/virtio_msg_ffa_dma_ops.c:110:27: error: incompatible integer to pointer conversion passing 'u64' (aka 'unsigned long long') to parameter of type 'const void *' [-Wint-conversion]
     110 |                 pages[i] = virt_to_page((u64)vaddr + PAGE_SIZE * i);
         |                            ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/arm64/include/asm/memory.h:409:50: note: expanded from macro 'virt_to_page'
     409 | #define virt_to_page(x)         pfn_to_page(virt_to_pfn(x))
         |                                 ~~~~~~~~~~~~~~~~~~~~~~~~^~~
   include/asm-generic/memory_model.h:37:40: note: expanded from macro '__pfn_to_page'
      37 | #define __pfn_to_page(pfn)      (vmemmap + (pfn))
         |                                             ^~~
   arch/arm64/include/asm/memory.h:382:53: note: passing argument to parameter 'kaddr' here
     382 | static inline unsigned long virt_to_pfn(const void *kaddr)
         |                                                     ^
   drivers/virtio/virtio_msg_ffa_dma_ops.c:185:17: warning: shift count >= width of type [-Wshift-count-overflow]
     185 |         return mask == DMA_BIT_MASK(64);
         |                        ^~~~~~~~~~~~~~~~
   include/linux/dma-mapping.h:77:54: note: expanded from macro 'DMA_BIT_MASK'
      77 | #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
         |                                                      ^ ~~~
   1 warning and 2 errors generated.


vim +42 drivers/virtio/virtio_msg_ffa_dma_ops.c

    23	
    24	static void *virtio_msg_dma_alloc(struct device *dev, size_t size,
    25					  dma_addr_t *dma_handle, gfp_t gfp,
    26					  unsigned long attrs)
    27	{
    28		size_t n_pages = PFN_UP(size), i;
    29		struct page **pages;
    30		void *vaddr;
    31		int ret;
    32	
    33		pages = kmalloc(sizeof(*pages) * n_pages, GFP_KERNEL);
    34		if (!pages)
    35			return NULL;
    36	
    37		vaddr = alloc_pages_exact(n_pages * PAGE_SIZE, gfp);
    38		if (!vaddr)
    39			goto out;
    40	
    41		for (i = 0; i < n_pages; i++)
  > 42			pages[i] = virt_to_page((u64)vaddr + PAGE_SIZE * i);
    43	
    44		ret = vmsg_ffa_bus_area_share(dev, pages, n_pages, dma_handle);
    45		if (ret) {
    46			dev_err(dev, "%s: Failed to share area: %d", __func__, ret);
    47			free_pages_exact(vaddr, n_pages * PAGE_SIZE);
    48			vaddr = NULL;
    49		}
    50	
    51	out:
    52		kfree(pages);
    53		return vaddr;
    54	}
    55	

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