Re: [PATCH v3 1/3] arm-smmu: move MSI_IOVA macro definitions

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

Hi Shyam,

kernel test robot noticed the following build errors:

[auto build test ERROR on soc/for-next]
[also build test ERROR on linus/master v6.16 next-20250807]
[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/Shyam-Saini/arm-smmu-move-MSI_IOVA-macro-definitions/20250807-055741
base:   https://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git for-next
patch link:    https://lore.kernel.org/r/20250806215539.1240561-2-shyamsaini%40linux.microsoft.com
patch subject: [PATCH v3 1/3] arm-smmu: move MSI_IOVA macro definitions
config: um-randconfig-r071-20250807 (https://download.01.org/0day-ci/archive/20250807/202508072221.zOvuARaV-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 7b8dea265e72c3037b6b1e54d5ab51b7e14f328b)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250807/202508072221.zOvuARaV-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/202508072221.zOvuARaV-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/iommu/arm/arm-smmu/arm-smmu.c:24:
   In file included from include/linux/dma-mapping.h:8:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/um/include/asm/io.h:24:
   include/asm-generic/io.h:1175:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
    1175 |         return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
         |                                                   ~~~~~~~~~~ ^
>> drivers/iommu/arm/arm-smmu/arm-smmu.c:1603:35: error: use of undeclared identifier 'MSI_IOVA_BASE'
    1603 |         region = iommu_alloc_resv_region(MSI_IOVA_BASE, MSI_IOVA_LENGTH,
         |                                          ^~~~~~~~~~~~~
   drivers/iommu/arm/arm-smmu/arm-smmu.c:1603:50: error: use of undeclared identifier 'MSI_IOVA_LENGTH'
    1603 |         region = iommu_alloc_resv_region(MSI_IOVA_BASE, MSI_IOVA_LENGTH,
         |                                                         ^~~~~~~~~~~~~~~
   1 warning and 2 errors generated.


vim +/MSI_IOVA_BASE +1603 drivers/iommu/arm/arm-smmu/arm-smmu.c

021bb8420d44cf drivers/iommu/arm-smmu.c              Robin Murphy 2016-09-14  1596  
f3ebee80b3131d drivers/iommu/arm-smmu.c              Eric Auger   2017-01-19  1597  static void arm_smmu_get_resv_regions(struct device *dev,
f3ebee80b3131d drivers/iommu/arm-smmu.c              Eric Auger   2017-01-19  1598  				      struct list_head *head)
f3ebee80b3131d drivers/iommu/arm-smmu.c              Eric Auger   2017-01-19  1599  {
f3ebee80b3131d drivers/iommu/arm-smmu.c              Eric Auger   2017-01-19  1600  	struct iommu_resv_region *region;
f3ebee80b3131d drivers/iommu/arm-smmu.c              Eric Auger   2017-01-19  1601  	int prot = IOMMU_WRITE | IOMMU_NOEXEC | IOMMU_MMIO;
f3ebee80b3131d drivers/iommu/arm-smmu.c              Eric Auger   2017-01-19  1602  
f3ebee80b3131d drivers/iommu/arm-smmu.c              Eric Auger   2017-01-19 @1603  	region = iommu_alloc_resv_region(MSI_IOVA_BASE, MSI_IOVA_LENGTH,
0251d0107cfb0b drivers/iommu/arm/arm-smmu/arm-smmu.c Lu Baolu     2022-10-19  1604  					 prot, IOMMU_RESV_SW_MSI, GFP_KERNEL);
f3ebee80b3131d drivers/iommu/arm-smmu.c              Eric Auger   2017-01-19  1605  	if (!region)
f3ebee80b3131d drivers/iommu/arm-smmu.c              Eric Auger   2017-01-19  1606  		return;
f3ebee80b3131d drivers/iommu/arm-smmu.c              Eric Auger   2017-01-19  1607  
f3ebee80b3131d drivers/iommu/arm-smmu.c              Eric Auger   2017-01-19  1608  	list_add_tail(&region->list, head);
273df9635385b2 drivers/iommu/arm-smmu.c              Robin Murphy 2017-03-16  1609  
273df9635385b2 drivers/iommu/arm-smmu.c              Robin Murphy 2017-03-16  1610  	iommu_dma_get_resv_regions(dev, head);
f3ebee80b3131d drivers/iommu/arm-smmu.c              Eric Auger   2017-01-19  1611  }
f3ebee80b3131d drivers/iommu/arm-smmu.c              Eric Auger   2017-01-19  1612  

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