[vivek-drm-tip:virtgpu_import_rfc 9/9] drivers/dma-buf/udmabuf.c:347:24: error: incompatible integer to pointer conversion passing 'unsigned long' to parameter of type 'const void *'

[vivek-drm-tip:virtgpu_import_rfc 9/9] drivers/dma-buf/udmabuf.c:347:24: error: incompatible integer to pointer conversion passing 'unsigned long' to parameter of type 'const void *'

[kernel test robot]

tree:   https://gitlab.freedesktop.org/Vivek/drm-tip.git virtgpu_import_rfc
head:   2347bf8ba6d850818b830aa54bb75d4b892fb6a8
commit: 2347bf8ba6d850818b830aa54bb75d4b892fb6a8 [9/9] udmabuf: Implement UDMABUF_CREATE_LIST_FOR_PCIDEV ioctl
config: arm-randconfig-002-20240401 (https://download.01.org/0day-ci/archive/20240401/202404012015.zh49v9wj-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 546dc2245ffc4cccd0b05b58b7a5955e355a3b27)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240401/202404012015.zh49v9wj-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/202404012015.zh49v9wj-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/dma-buf/udmabuf.c:4:
   In file included from include/linux/dma-buf.h:19:
   In file included from include/linux/scatterlist.h:8:
   In file included from include/linux/mm.h:2188:
   include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     522 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
>> drivers/dma-buf/udmabuf.c:347:24: error: incompatible integer to pointer conversion passing 'unsigned long' to parameter of type 'const void *' [-Wint-conversion]
     347 |                         page = virt_to_page((unsigned long)addr + size);
         |                                             ^~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/arm/include/asm/memory.h:390:53: note: expanded from macro 'virt_to_page'
     390 | #define virt_to_page(kaddr)     pfn_to_page(virt_to_pfn(kaddr))
         |                                                         ^~~~~
   include/asm-generic/memory_model.h:18:41: note: expanded from macro '__pfn_to_page'
      18 | #define __pfn_to_page(pfn)      (mem_map + ((pfn) - ARCH_PFN_OFFSET))
         |                                              ^~~
   arch/arm/include/asm/memory.h:296:53: note: passing argument to parameter 'p' here
     296 | static inline unsigned long virt_to_pfn(const void *p)
         |                                                     ^
   drivers/dma-buf/udmabuf.c:565:9: warning: shift count >= width of type [-Wshift-count-overflow]
     565 |                                            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))
         |                                                      ^ ~~~
   2 warnings and 1 error generated.


vim +347 drivers/dma-buf/udmabuf.c

   299	
   300	static int handle_pcidev_pages(struct udmabuf *ubuf,
   301				       struct udmabuf_create_list *head,
   302				       struct udmabuf_create_item *list)
   303	{
   304		struct pci_dev *pdev = NULL;
   305		resource_size_t bar_size;
   306		pgoff_t pgbuf = 0;
   307		struct page *page;
   308		int i, ret;
   309		size_t size;
   310		void *addr;
   311	
   312		for (i = 0; i < head->count; i++) {
   313			if (!ubuf->pdev) {
   314				pdev = pci_get_domain_bus_and_slot(0,
   315							PCI_BUS_NUM(list[i].devid),
   316							list[i].devid & 0xff);
   317				if (!pdev) {
   318					ret = -ENODEV;
   319					goto err;
   320				}
   321	
   322				ubuf->pdev = pdev;
   323			}
   324	
   325			bar_size = pci_resource_len(pdev, list[i].bar);
   326			if (list[i].offset > bar_size ||
   327			    list[i].offset + list[i].size > bar_size) {
   328				ret = -EINVAL;
   329				goto err;
   330			}
   331	
   332			ret = pci_p2pdma_add_resource(pdev,
   333						      list[i].bar,
   334						      list[i].size,
   335						      list[i].offset);
   336			if (ret)
   337				goto err;
   338	
   339			addr = pci_alloc_p2pmem(pdev, list[i].size);
   340			if (!addr) {
   341				ret = -EINVAL;
   342				goto err;
   343			}
   344	
   345			size = 0;
   346			while (size < list[i].size) {
 > 347				page = virt_to_page((unsigned long)addr + size);
   348				ubuf->pages[pgbuf++] = page;
   349	
   350				size += PAGE_SIZE;
   351			}
   352		}
   353	
   354	err:
   355		while (pgbuf > 0 && ubuf->pages[--pgbuf])
   356			pci_free_p2pmem(pdev,
   357					page_to_virt(ubuf->pages[pgbuf]),
   358					PAGE_SIZE);
   359		if (pdev)
   360			pci_dev_put(pdev);
   361		return ret;
   362	}
   363	

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