Hi Daniel, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on 10b82d5176488acee2820e5a2cf0f2ec5c3488b6] url: https://github.com/0day-ci/linux/commits/Daniel-Latypov/kunit-introduce-c... base: 10b82d5176488acee2820e5a2cf0f2ec5c3488b6 config: x86_64-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from lib/kunit/kunit-example-test.c:10: 60 | DEFINE_STRUCT_CLASS_MOCK(METHOD(foo), CLASS(example), | ^~~ include/kunit/mock.h:328:15: note: in definition of macro 'DEFINE_MOCK_CLIENT_COMMON' 328 | return_type name(PARAM_LIST_FROM_TYPES(param_types)) \ | ^~~~ include/kunit/mock.h:380:3: note: in expansion of macro 'DEFINE_MOCK_METHOD_CLIENT_COMMON' 380 | DEFINE_MOCK_METHOD_CLIENT_COMMON(name, \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/kunit/mock.h:437:3: note: in expansion of macro 'DEFINE_MOCK_METHOD_CLIENT' 437 | DEFINE_MOCK_METHOD_CLIENT(name, \ | ^~~~~~~~~~~~~~~~~~~~~~~~~ include/kunit/mock.h:459:3: note: in expansion of macro 'DEFINE_MOCK_COMMON' 459 | DEFINE_MOCK_COMMON(name, \ | ^~~~~~~~~~~~~~~~~~ include/kunit/mock.h:468:3: note: in expansion of macro 'DEFINE_STRUCT_CLASS_MOCK_HANDLE_INDEX_INTERNAL' 468 | DEFINE_STRUCT_CLASS_MOCK_HANDLE_INDEX_INTERNAL(name, \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/kunit/mock.h:506:3: note: in expansion of macro 'DEFINE_STRUCT_CLASS_MOCK_HANDLE_INDEX' 506 | DEFINE_STRUCT_CLASS_MOCK_HANDLE_INDEX(name, \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ lib/kunit/kunit-example-test.c:60:1: note: in expansion of macro 'DEFINE_STRUCT_CLASS_MOCK' 60 | DEFINE_STRUCT_CLASS_MOCK(METHOD(foo), CLASS(example), | ^~~~~~~~~~~~~~~~~~~~~~~~ lib/kunit/kunit-example-test.c:60:26: note: in expansion of macro 'METHOD' 60 | DEFINE_STRUCT_CLASS_MOCK(METHOD(foo), CLASS(example), | ^~~~~~ 402 | struct mock_expectation *mock_master_##name( \ | ^~~~~~~~~~~~ include/kunit/mock.h:420:3: note: in expansion of macro 'DEFINE_MOCK_MASTER_COMMON_INTERNAL' 420 | DEFINE_MOCK_MASTER_COMMON_INTERNAL(name, \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/kunit/mock.h:427:3: note: in expansion of macro 'DEFINE_MOCK_MASTER_COMMON' 427 | DEFINE_MOCK_MASTER_COMMON(name, \ | ^~~~~~~~~~~~~~~~~~~~~~~~~ include/kunit/mock.h:442:3: note: in expansion of macro 'DEFINE_MOCK_METHOD_MASTER' 442 | DEFINE_MOCK_METHOD_MASTER(name, handle_index, param_types) | ^~~~~~~~~~~~~~~~~~~~~~~~~ include/kunit/mock.h:459:3: note: in expansion of macro 'DEFINE_MOCK_COMMON' 459 | DEFINE_MOCK_COMMON(name, \ | ^~~~~~~~~~~~~~~~~~ include/kunit/mock.h:468:3: note: in expansion of macro 'DEFINE_STRUCT_CLASS_MOCK_HANDLE_INDEX_INTERNAL' 468 | DEFINE_STRUCT_CLASS_MOCK_HANDLE_INDEX_INTERNAL(name, \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/kunit/mock.h:506:3: note: in expansion of macro 'DEFINE_STRUCT_CLASS_MOCK_HANDLE_INDEX' 506 | DEFINE_STRUCT_CLASS_MOCK_HANDLE_INDEX(name, \ | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ lib/kunit/kunit-example-test.c:60:1: note: in expansion of macro 'DEFINE_STRUCT_CLASS_MOCK' 60 | DEFINE_STRUCT_CLASS_MOCK(METHOD(foo), CLASS(example), | ^~~~~~~~~~~~~~~~~~~~~~~~ 85 | DEFINE_STRUCT_CLASS_MOCK_INIT(example, example_init); | ^~~~~~~ include/kunit/mock.h:194:35: note: in definition of macro 'MOCK_INIT_ID' 194 | #define MOCK_INIT_ID(struct_name) struct_name##mock_init | ^~~~~~~~~~~ lib/kunit/kunit-example-test.c:85:1: note: in expansion of macro 'DEFINE_STRUCT_CLASS_MOCK_INIT' 85 | DEFINE_STRUCT_CLASS_MOCK_INIT(example, example_init); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ # https://github.com/0day-ci/linux/commit/80a5526fd886c8b3d5ad6ba475b3d1087... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Daniel-Latypov/kunit-introduce-class-mocking-support/20200919-023253 git checkout 80a5526fd886c8b3d5ad6ba475b3d1087943f70a vim +/foo +60 lib/kunit/kunit-example-test.c 55 56 /* 57 * This macro creates a mock implementation of the specified method of the 58 * specified class. 59 */ 61 RETURNS(int), 62 PARAMS(struct example *, int)); 63 64 /* 65 * This tells KUnit how to initialize the parts of the mock that come from the 66 * parent. In this example, all we have to do is populate the member functions 67 * of the parent class with the mock versions we defined. 68 */ 69 static int example_init(struct MOCK(example) *mock_example) 70 { 71 /* This is how you get a pointer to the parent class of a mock. */ 72 struct example *example = mock_get_trgt(mock_example); 73 74 /* 75 * Here we populate the member function (method) with our mock method. 76 */ 77 example->foo = foo; 78 return 0; 79 } 80 81 /* 82 * This registers our parent init function above, allowing KUnit to create a 83 * constructor for the mock. 84 */ 86 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org