linux-kernel - include/linux/stddef.h:8:14: warning: passing argument 5 of 'drm_gpusvm_init' makes integer from pointer without a cast

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Message-ID: <202510111506.HRLvzZmk-lkp@intel.com>
Date: Sat, 11 Oct 2025 15:58:32 +0800
From: kernel test robot <lkp@...el.com>
To: Thomas Hellström <thomas.hellstrom@...ux.intel.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Lucas De Marchi <lucas.demarchi@...el.com>,
	Matthew Auld <matthew.auld@...el.com>,
	Matthew Brost <matthew.brost@...el.com>
Subject: include/linux/stddef.h:8:14: warning: passing argument 5 of
 'drm_gpusvm_init' makes integer from pointer without a cast

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   0739473694c4878513031006829f1030ec850bc2
commit: 10aa5c80603088d10c2cd5e7e27d561a8fb59c7e drm/gpusvm, drm/xe: Fix userptr to not allow device private pages
date:   8 days ago
config: x86_64-randconfig-r123-20251011 (https://download.01.org/0day-ci/archive/20251011/202510111506.HRLvzZmk-lkp@intel.com/config)
compiler: gcc-13 (Debian 13.3.0-16) 13.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251011/202510111506.HRLvzZmk-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202510111506.HRLvzZmk-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from include/uapi/linux/posix_types.h:5,
                    from include/uapi/linux/types.h:14,
                    from include/linux/types.h:6,
                    from include/linux/objtool_types.h:7,
                    from include/linux/objtool.h:5,
                    from include/linux/instrumentation.h:7,
                    from arch/x86/include/asm/bug.h:6,
                    from include/linux/bug.h:5,
                    from include/linux/mmdebug.h:5,
                    from include/linux/mm.h:6,
                    from include/linux/pagemap.h:8,
                    from include/drm/ttm/ttm_tt.h:30,
                    from drivers/gpu/drm/xe/xe_bo.h:9,
                    from drivers/gpu/drm/xe/xe_bo.c:6:
   drivers/gpu/drm/xe/xe_svm.h: In function 'xe_svm_init':
>> include/linux/stddef.h:8:14: warning: passing argument 5 of 'drm_gpusvm_init' makes integer from pointer without a cast [-Wint-conversion]
       8 | #define NULL ((void *)0)
         |              ^~~~~~~~~~~
         |              |
         |              void *
   drivers/gpu/drm/xe/xe_svm.h:217:38: note: in expansion of macro 'NULL'
     217 |                                NULL, NULL, 0, 0, 0, NULL, NULL, 0);
         |                                      ^~~~
   In file included from drivers/gpu/drm/xe/xe_bo_types.h:11,
                    from drivers/gpu/drm/xe/xe_bo.h:11:
   include/drm/drm_gpusvm.h:254:35: note: expected 'long unsigned int' but argument is of type 'void *'
     254 |                     unsigned long mm_start, unsigned long mm_range,
         |                     ~~~~~~~~~~~~~~^~~~~~~~
   include/linux/stddef.h:8:14: warning: passing argument 10 of 'drm_gpusvm_init' makes integer from pointer without a cast [-Wint-conversion]
       8 | #define NULL ((void *)0)
         |              ^~~~~~~~~~~
         |              |
         |              void *
   drivers/gpu/drm/xe/xe_svm.h:217:59: note: in expansion of macro 'NULL'
     217 |                                NULL, NULL, 0, 0, 0, NULL, NULL, 0);
         |                                                           ^~~~
   include/drm/drm_gpusvm.h:257:59: note: expected 'int' but argument is of type 'void *'
     257 |                     const unsigned long *chunk_sizes, int num_chunks);
         |                                                       ~~~~^~~~~~~~~~
   In file included from drivers/gpu/drm/xe/xe_res_cursor.h:38,
                    from drivers/gpu/drm/xe/xe_bo.c:34:
   drivers/gpu/drm/xe/xe_svm.h:216:16: error: too many arguments to function 'drm_gpusvm_init'
     216 |         return drm_gpusvm_init(&vm->svm.gpusvm, "Xe SVM (simple)", &vm->xe->drm,
         |                ^~~~~~~~~~~~~~~
   include/drm/drm_gpusvm.h:251:5: note: declared here
     251 | int drm_gpusvm_init(struct drm_gpusvm *gpusvm,
         |     ^~~~~~~~~~~~~~~


vim +/drm_gpusvm_init +8 include/linux/stddef.h

^1da177e4c3f41 Linus Torvalds   2005-04-16  6  
^1da177e4c3f41 Linus Torvalds   2005-04-16  7  #undef NULL
^1da177e4c3f41 Linus Torvalds   2005-04-16 @8  #define NULL ((void *)0)
6e218287432472 Richard Knutsson 2006-09-30  9  

:::::: The code at line 8 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@...970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@...970.osdl.org>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki