[jgunthorpe:iommu_pt 37/53] drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c:37: warning: "VA_BITS" redefined

[jgunthorpe:iommu_pt 37/53] drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c:37: warning: "VA_BITS" redefined

[kernel test robot]

tree:   https://github.com/jgunthorpe/linux iommu_pt
head:   2bf23486e7eae67485953abf3529ad2d3a90384b
commit: 23dbb9b1e1ec4cc15b44eeb954b5045ed86daf78 [37/53] add COMPILE_TEST
config: loongarch-allyesconfig (https://download.01.org/0day-ci/archive/20240704/202407041854.qownApOL-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240704/202407041854.qownApOL-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/202407041854.qownApOL-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c:32:
   drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h:755:41: error: field 'mmu_notifier' has incomplete type
     755 |         struct mmu_notifier             mmu_notifier;
         |                                         ^~~~~~~~~~~~
>> drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c:37: warning: "VA_BITS" redefined
      37 | #define VA_BITS 39
         | 
   In file included from arch/loongarch/include/asm/uaccess.h:17,
                    from include/linux/uaccess.h:11,
                    from include/linux/sched/task.h:13,
                    from include/linux/sched/signal.h:9,
                    from include/linux/rcuwait.h:6,
                    from include/linux/percpu-rwsem.h:7,
                    from include/linux/fs.h:33,
                    from arch/loongarch/include/asm/elf.h:9,
                    from include/linux/elf.h:6,
                    from include/linux/module.h:19,
                    from include/linux/device/driver.h:21,
                    from include/linux/device.h:32,
                    from include/linux/acpi.h:14,
                    from drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c:12:
   arch/loongarch/include/asm/pgtable.h:45: note: this is the location of the previous definition
      45 | #define VA_BITS         (PGDIR_SHIFT + (PAGE_SHIFT - 3))
         | 


vim +/VA_BITS +37 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c

    31	
  > 32	#include "arm-smmu-v3.h"
    33	#include "../../dma-iommu.h"
    34	
    35	#ifndef __aarch64__
    36	#define wfe()
  > 37	#define VA_BITS 39
    38	#define cpus_have_cap(x) false
    39	#endif
    40	

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