Re: [PATCH drm-next v5 03/14] drm: manager to keep track of GPUs VA mappings

[kernel test robot <lkp@xxxxxxxxx>]

Hi Danilo,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 2222dcb0775d36de28992f56455ab3967b30d380]

url:    https://github.com/intel-lab-lkp/linux/commits/Danilo-Krummrich/drm-execution-context-for-GEM-buffers-v4/20230620-084448
base:   2222dcb0775d36de28992f56455ab3967b30d380
patch link:    https://lore.kernel.org/r/20230620004217.4700-4-dakr%40redhat.com
patch subject: [PATCH drm-next v5 03/14] drm: manager to keep track of GPUs VA mappings
config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20230620/202306201034.GucldV3r-lkp@xxxxxxxxx/config)
compiler: m68k-linux-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20230620/202306201034.GucldV3r-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306201034.GucldV3r-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

   In file included from arch/m68k/include/asm/bug.h:32,
                    from include/linux/bug.h:5,
                    from include/linux/thread_info.h:13,
                    from include/asm-generic/preempt.h:5,
                    from ./arch/m68k/include/generated/asm/preempt.h:1,
                    from include/linux/preempt.h:78,
                    from include/linux/spinlock.h:56,
                    from include/linux/kref.h:16,
                    from include/drm/drm_gem.h:37,
                    from drivers/gpu/drm/drm_gpuva_mgr.c:28:
   drivers/gpu/drm/drm_gpuva_mgr.c: In function 'drm_gpuva_check_overflow':
>> drivers/gpu/drm/drm_gpuva_mgr.c:675:21: warning: format '%lu' expects argument of type 'long unsigned int', but argument 5 has type 'unsigned int' [-Wformat=]
     675 |                     "GPUVA address limited to %lu bytes, see Documentation.\n",
         |                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/asm-generic/bug.h:97:62: note: in definition of macro '__WARN_printf'
      97 |                 warn_slowpath_fmt(__FILE__, __LINE__, taint, arg);      \
         |                                                              ^~~
   drivers/gpu/drm/drm_gpuva_mgr.c:674:16: note: in expansion of macro 'WARN'
     674 |         return WARN(check_add_overflow(addr, range, &end),
         |                ^~~~
   drivers/gpu/drm/drm_gpuva_mgr.c:675:49: note: format string is defined here
     675 |                     "GPUVA address limited to %lu bytes, see Documentation.\n",
         |                                               ~~^
         |                                                 |
         |                                                 long unsigned int
         |                                               %u
   drivers/gpu/drm/drm_gpuva_mgr.c: In function '__drm_gpuva_sm_map':
   drivers/gpu/drm/drm_gpuva_mgr.c:1314:32: warning: variable 'prev' set but not used [-Wunused-but-set-variable]
    1314 |         struct drm_gpuva *va, *prev = NULL;
         |                                ^~~~


vim +675 drivers/gpu/drm/drm_gpuva_mgr.c

   668	
   669	static inline bool
   670	drm_gpuva_check_overflow(u64 addr, u64 range)
   671	{
   672		MTREE_INDEX_TYPE end;
   673	
   674		return WARN(check_add_overflow(addr, range, &end),
 > 675			    "GPUVA address limited to %lu bytes, see Documentation.\n",
   676			    MTREE_INDEX_SIZE);
   677	}
   678	

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