Hi Sakari, I love your patch! Yet something to improve: [auto build test ERROR on linuxtv-media/master] [also build test ERROR on next-20210212] [cannot apply to v5.11] [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] url: https://github.com/0day-ci/linux/commits/Sakari-Ailus/v4l-async-Fix-kerne... base: git://linuxtv.org/media_tree.git master config: x86_64-randconfig-r035-20210215 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://github.com/0day-ci/linux/commit/8e8c47cba531c1706847f07a4af5cd19a... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Sakari-Ailus/v4l-async-Fix-kerneldoc-documentation-for-async-functions/20210215-204146 git checkout 8e8c47cba531c1706847f07a4af5cd19aa33f351 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross 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 errors (new ones prefixed by >>): asd = v4l2_async_notifier_add_fwnode_subdev(notifier, ^ include/media/v4l2-async.h:179:12: note: expanded from macro 'v4l2_async_notifier_add_fwnode_subdev' ((__type *)__v4l2_async_notifier_add_fwnode_subdev(notifier, fwnode, \ ^ include/media/v4l2-async.h:179:4: note: expanded from macro 'v4l2_async_notifier_add_fwnode_subdev' ((__type *)__v4l2_async_notifier_add_fwnode_subdev(notifier, fwnode, \ ^ include/linux/ctype.h:21:28: note: '_ctype' declared here extern const unsigned char _ctype[]; ^ drivers/media/v4l2-core/v4l2-fwnode.c:1246:9: error: expected expression asd = v4l2_async_notifier_add_fwnode_subdev(notifier, fwnode, ^ include/media/v4l2-async.h:179:12: note: expanded from macro 'v4l2_async_notifier_add_fwnode_subdev' ((__type *)__v4l2_async_notifier_add_fwnode_subdev(notifier, fwnode, \ ^ drivers/media/v4l2-core/v4l2-fwnode.c:1246:9: error: use of undeclared identifier '__type'; did you mean '_ctype'? include/media/v4l2-async.h:179:4: note: expanded from macro 'v4l2_async_notifier_add_fwnode_subdev' ((__type *)__v4l2_async_notifier_add_fwnode_subdev(notifier, fwnode, \ ^ include/linux/ctype.h:21:28: note: '_ctype' declared here extern const unsigned char _ctype[]; ^ 4 errors generated. vim +945 drivers/media/v4l2-core/v4l2-fwnode.c 9ca46531213295 Sakari Ailus 2017-08-17 902 d84285390f0722 Sakari Ailus 2017-06-20 903 /* d84285390f0722 Sakari Ailus 2017-06-20 904 * v4l2_fwnode_reference_parse - parse references for async sub-devices d84285390f0722 Sakari Ailus 2017-06-20 905 * @dev: the device node the properties of which are parsed for references d84285390f0722 Sakari Ailus 2017-06-20 906 * @notifier: the async notifier where the async subdevs will be added d84285390f0722 Sakari Ailus 2017-06-20 907 * @prop: the name of the property d84285390f0722 Sakari Ailus 2017-06-20 908 * d84285390f0722 Sakari Ailus 2017-06-20 909 * Return: 0 on success d84285390f0722 Sakari Ailus 2017-06-20 910 * -ENOENT if no entries were found d84285390f0722 Sakari Ailus 2017-06-20 911 * -ENOMEM if memory allocation failed d84285390f0722 Sakari Ailus 2017-06-20 912 * -EINVAL if property parsing failed d84285390f0722 Sakari Ailus 2017-06-20 913 */ 6087b21533fed7 Mauro Carvalho Chehab 2018-10-04 914 static int v4l2_fwnode_reference_parse(struct device *dev, 6087b21533fed7 Mauro Carvalho Chehab 2018-10-04 915 struct v4l2_async_notifier *notifier, d84285390f0722 Sakari Ailus 2017-06-20 916 const char *prop) d84285390f0722 Sakari Ailus 2017-06-20 917 { d84285390f0722 Sakari Ailus 2017-06-20 918 struct fwnode_reference_args args; d84285390f0722 Sakari Ailus 2017-06-20 919 unsigned int index; d84285390f0722 Sakari Ailus 2017-06-20 920 int ret; d84285390f0722 Sakari Ailus 2017-06-20 921 d84285390f0722 Sakari Ailus 2017-06-20 922 for (index = 0; 6087b21533fed7 Mauro Carvalho Chehab 2018-10-04 923 !(ret = fwnode_property_get_reference_args(dev_fwnode(dev), 6087b21533fed7 Mauro Carvalho Chehab 2018-10-04 924 prop, NULL, 0, 6087b21533fed7 Mauro Carvalho Chehab 2018-10-04 925 index, &args)); d84285390f0722 Sakari Ailus 2017-06-20 926 index++) d84285390f0722 Sakari Ailus 2017-06-20 927 fwnode_handle_put(args.fwnode); d84285390f0722 Sakari Ailus 2017-06-20 928 d84285390f0722 Sakari Ailus 2017-06-20 929 if (!index) d84285390f0722 Sakari Ailus 2017-06-20 930 return -ENOENT; d84285390f0722 Sakari Ailus 2017-06-20 931 d84285390f0722 Sakari Ailus 2017-06-20 932 /* d84285390f0722 Sakari Ailus 2017-06-20 933 * Note that right now both -ENODATA and -ENOENT may signal d84285390f0722 Sakari Ailus 2017-06-20 934 * out-of-bounds access. Return the error in cases other than that. d84285390f0722 Sakari Ailus 2017-06-20 935 */ d84285390f0722 Sakari Ailus 2017-06-20 936 if (ret != -ENOENT && ret != -ENODATA) d84285390f0722 Sakari Ailus 2017-06-20 937 return ret; d84285390f0722 Sakari Ailus 2017-06-20 938 6087b21533fed7 Mauro Carvalho Chehab 2018-10-04 939 for (index = 0; 6087b21533fed7 Mauro Carvalho Chehab 2018-10-04 940 !fwnode_property_get_reference_args(dev_fwnode(dev), prop, NULL, 6087b21533fed7 Mauro Carvalho Chehab 2018-10-04 941 0, index, &args); d84285390f0722 Sakari Ailus 2017-06-20 942 index++) { d84285390f0722 Sakari Ailus 2017-06-20 943 struct v4l2_async_subdev *asd; d84285390f0722 Sakari Ailus 2017-06-20 944 6087b21533fed7 Mauro Carvalho Chehab 2018-10-04 @945 asd = v4l2_async_notifier_add_fwnode_subdev(notifier, 6087b21533fed7 Mauro Carvalho Chehab 2018-10-04 946 args.fwnode, b01edcbd409cf7 Laurent Pinchart 2021-01-18 947 struct v4l2_async_subdev); 016413d967061f Sakari Ailus 2019-04-04 948 fwnode_handle_put(args.fwnode); eae2aed1eab9bf Steve Longerbeam 2018-09-29 949 if (IS_ERR(asd)) { eae2aed1eab9bf Steve Longerbeam 2018-09-29 950 /* not an error if asd already exists */ 016413d967061f Sakari Ailus 2019-04-04 951 if (PTR_ERR(asd) == -EEXIST) eae2aed1eab9bf Steve Longerbeam 2018-09-29 952 continue; d84285390f0722 Sakari Ailus 2017-06-20 953 016413d967061f Sakari Ailus 2019-04-04 954 return PTR_ERR(asd); d84285390f0722 Sakari Ailus 2017-06-20 955 } d84285390f0722 Sakari Ailus 2017-06-20 956 } d84285390f0722 Sakari Ailus 2017-06-20 957 d84285390f0722 Sakari Ailus 2017-06-20 958 return 0; d84285390f0722 Sakari Ailus 2017-06-20 959 } d84285390f0722 Sakari Ailus 2017-06-20 960 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org