tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: d33bec7b3dfa36691ed53ccaaf187d90b53be852 commit: 0bfc6a4ea63c2adac71a824397ef48f28dbc5e47 vfio: Split creation of a vfio_device into init and register ops date: 6 months ago config: microblaze-buildonly-randconfig-r004-20210927 (attached as .config) compiler: microblaze-linux-gcc (GCC) 11.2.0 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 # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0bfc6a4ea63c2adac71a824397ef48f28dbc5e47 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 0bfc6a4ea63c2adac71a824397ef48f28dbc5e47 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=microblaze SHELL=/bin/bash arch/microblaze/kernel/ drivers/base/ drivers/char/ drivers/clk/ drivers/clocksource/ drivers/dax/ drivers/firewire/ drivers/gpu/drm/amd/amdgpu/ drivers/gpu/drm/amd/display/amdgpu_dm/ drivers/gpu/drm/amd/display/dc/dce/ drivers/gpu/drm/amd/display/dc/dce110/ drivers/gpu/drm/exynos/ drivers/i3c/ drivers/iio/accel/ drivers/memstick/host/ drivers/nvmem/ drivers/pci/ drivers/power/supply/ drivers/rapidio/ drivers/rtc/ drivers/soc/qcom/ drivers/tty/ drivers/vfio/ drivers/video/fbdev/via/ drivers/w1/masters/ fs/ init/ kernel/ lib/ mm/ net/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): drivers/vfio/vfio.c:214: warning: Function parameter or member 'ops' not described in 'vfio_register_iommu_driver' drivers/vfio/vfio.c:214: warning: expecting prototype for IOMMU driver registration(). Prototype was for vfio_register_iommu_driver() instead drivers/vfio/vfio.c:263: warning: Function parameter or member 'group' not described in 'vfio_alloc_group_minor' drivers/vfio/vfio.c:263: warning: expecting prototype for free(). Prototype was for vfio_alloc_group_minor() instead drivers/vfio/vfio.c:283: warning: Function parameter or member 'container' not described in 'vfio_container_get' drivers/vfio/vfio.c:283: warning: expecting prototype for Container objects(). Prototype was for vfio_container_get() instead drivers/vfio/vfio.c:315: warning: Function parameter or member 'iommu_group' not described in 'vfio_create_group' drivers/vfio/vfio.c:315: warning: expecting prototype for Group objects(). Prototype was for vfio_create_group() instead drivers/vfio/vfio.c:527: warning: Function parameter or member 'device' not described in 'vfio_device_put' >> drivers/vfio/vfio.c:527: warning: expecting prototype for Device objects(). Prototype was for vfio_device_put() instead drivers/vfio/vfio.c:633: warning: Function parameter or member 'group' not described in 'vfio_group_nb_add_dev' drivers/vfio/vfio.c:633: warning: Function parameter or member 'dev' not described in 'vfio_group_nb_add_dev' drivers/vfio/vfio.c:633: warning: expecting prototype for Async device support(). Prototype was for vfio_group_nb_add_dev() instead drivers/vfio/vfio.c:745: warning: Function parameter or member 'device' not described in 'vfio_init_group_dev' drivers/vfio/vfio.c:745: warning: Function parameter or member 'dev' not described in 'vfio_init_group_dev' drivers/vfio/vfio.c:745: warning: Function parameter or member 'ops' not described in 'vfio_init_group_dev' drivers/vfio/vfio.c:745: warning: Function parameter or member 'device_data' not described in 'vfio_init_group_dev' drivers/vfio/vfio.c:745: warning: expecting prototype for VFIO driver API(). Prototype was for vfio_init_group_dev() instead drivers/vfio/vfio.c:833: warning: Function parameter or member 'dev' not described in 'vfio_device_get_from_dev' drivers/vfio/vfio.c:833: warning: expecting prototype for Even if the(). Prototype was for vfio_device_get_from_dev() instead drivers/vfio/vfio.c:982: warning: Function parameter or member 'container' not described in 'vfio_ioctl_check_extension' drivers/vfio/vfio.c:982: warning: Function parameter or member 'arg' not described in 'vfio_ioctl_check_extension' drivers/vfio/vfio.c:982: warning: expecting prototype for vfio(). Prototype was for vfio_ioctl_check_extension() instead drivers/vfio/vfio.c:1258: warning: Function parameter or member 'group' not described in '__vfio_group_unset_container' drivers/vfio/vfio.c:1258: warning: expecting prototype for GROUP(). Prototype was for __vfio_group_unset_container() instead drivers/vfio/vfio.c:1593: warning: Function parameter or member 'inode' not described in 'vfio_device_fops_release' drivers/vfio/vfio.c:1593: warning: Function parameter or member 'filep' not described in 'vfio_device_fops_release' drivers/vfio/vfio.c:1593: warning: expecting prototype for VFIO Device fd(). Prototype was for vfio_device_fops_release() instead drivers/vfio/vfio.c:1660: warning: wrong kernel-doc identifier on line: * External user API, exported by symbols to be linked dynamically. drivers/vfio/vfio.c:1705: warning: wrong kernel-doc identifier on line: * External user API, exported by symbols to be linked dynamically. drivers/vfio/vfio.c:1784: warning: Function parameter or member 'caps' not described in 'vfio_info_cap_add' drivers/vfio/vfio.c:1784: warning: Function parameter or member 'size' not described in 'vfio_info_cap_add' drivers/vfio/vfio.c:1784: warning: Function parameter or member 'id' not described in 'vfio_info_cap_add' drivers/vfio/vfio.c:1784: warning: Function parameter or member 'version' not described in 'vfio_info_cap_add' drivers/vfio/vfio.c:1784: warning: expecting prototype for Sub(). Prototype was for vfio_info_cap_add() instead drivers/vfio/vfio.c:2321: warning: Function parameter or member 'dev' not described in 'vfio_devnode' drivers/vfio/vfio.c:2321: warning: Function parameter or member 'mode' not described in 'vfio_devnode' drivers/vfio/vfio.c:2321: warning: expecting prototype for class support(). Prototype was for vfio_devnode() instead vim +527 drivers/vfio/vfio.c 7ed3ea8a71187a Kirti Wankhede 2016-11-17 521 cba3345cc494ad Alex Williamson 2012-07-31 522 /** cba3345cc494ad Alex Williamson 2012-07-31 523 * Device objects - create, release, get, put, search cba3345cc494ad Alex Williamson 2012-07-31 524 */ cba3345cc494ad Alex Williamson 2012-07-31 525 /* Device reference always implies a group reference */ 44f507163d9e51 Vijay Mohan Pandarathil 2013-03-11 526 void vfio_device_put(struct vfio_device *device) cba3345cc494ad Alex Williamson 2012-07-31 @527 { 5e42c999445bd0 Jason Gunthorpe 2021-03-30 528 if (refcount_dec_and_test(&device->refcount)) 5e42c999445bd0 Jason Gunthorpe 2021-03-30 529 complete(&device->comp); cba3345cc494ad Alex Williamson 2012-07-31 530 } 44f507163d9e51 Vijay Mohan Pandarathil 2013-03-11 531 EXPORT_SYMBOL_GPL(vfio_device_put); cba3345cc494ad Alex Williamson 2012-07-31 532 :::::: The code at line 527 was first introduced by commit :::::: cba3345cc494ad286ca8823f44b2c16cae496679 vfio: VFIO core :::::: TO: Alex Williamson :::::: CC: Alex Williamson --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org