tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 230c2b30f879859ac3e9d3cc46407a9dbb103160 commit: b0908eee74d6b5fdec924e1fcfcdb8184888ee61 [1597/1597] vfio: parallelize vfio_pin_map_dma config: arm64-randconfig-003-20250429 (https://download.01.org/0day-ci/archive/20250429/202504290542.wZ43d7od-lkp@i...) compiler: aarch64-linux-gcc (GCC) 9.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250429/202504290542.wZ43d7od-lkp@i...) 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@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202504290542.wZ43d7od-lkp@intel.com/ All warnings (new ones prefixed by >>): In file included from drivers/vfio/vfio_iommu_type1.c:45: drivers/vfio/vfio_iommu_type1.c: In function 'vfio_pin_map_dma':

...

include/linux/ktask.h:123:21: warning: cast between incompatible function types from 'int (*)(long unsigned int, long unsigned int, struct vfio_pin_args *)' to 'int (*)(void *, void *, void *)' [-Wcast-function-type] 123 | .kc_thread_func = (ktask_thread_func)(thread_func), \ | ^ include/linux/ktask.h:139:3: note: in expansion of macro 'KTASK_CTL_INITIALIZER' 139 | KTASK_CTL_INITIALIZER(thread_func, func_arg, min_chunk_size) \ | ^~~~~~~~~~~~~~~~~~~~~ drivers/vfio/vfio_iommu_type1.c:1120:2: note: in expansion of macro 'DEFINE_KTASK_CTL' 1120 | DEFINE_KTASK_CTL(ctl, vfio_pin_map_dma_chunk, &args, PMD_SIZE); | ^~~~~~~~~~~~~~~~ include/linux/ktask.h:163:25: warning: cast between incompatible function types from 'void (*)(long unsigned int, long unsigned int, struct vfio_pin_args *)' to 'void (*)(void *, void *, void *)' [-Wcast-function-type] 163 | ((ctl)->kc_undo_func = (ktask_undo_func)(undo_func)) | ^ drivers/vfio/vfio_iommu_type1.c:1122:2: note: in expansion of macro 'ktask_ctl_set_undo_func' 1122 | ktask_ctl_set_undo_func(&ctl, vfio_pin_map_dma_undo); | ^~~~~~~~~~~~~~~~~~~~~~~

vim +123 include/linux/ktask.h c48676ef6b6f9c Daniel Jordan 2019-08-14 120 c48676ef6b6f9c Daniel Jordan 2019-08-14 121 #define KTASK_CTL_INITIALIZER(thread_func, func_arg, min_chunk_size) \ c48676ef6b6f9c Daniel Jordan 2019-08-14 122 { \ c48676ef6b6f9c Daniel Jordan 2019-08-14 @123 .kc_thread_func = (ktask_thread_func)(thread_func), \ 69cc5b58cc50d2 Daniel Jordan 2019-08-14 124 .kc_undo_func = NULL, \ c48676ef6b6f9c Daniel Jordan 2019-08-14 125 .kc_func_arg = (func_arg), \ c48676ef6b6f9c Daniel Jordan 2019-08-14 126 .kc_min_chunk_size = (min_chunk_size), \ c48676ef6b6f9c Daniel Jordan 2019-08-14 127 .kc_iter_func = (ktask_iter_range), \ c48676ef6b6f9c Daniel Jordan 2019-08-14 128 .kc_max_threads = 0, \ c48676ef6b6f9c Daniel Jordan 2019-08-14 129 } c48676ef6b6f9c Daniel Jordan 2019-08-14 130 c48676ef6b6f9c Daniel Jordan 2019-08-14 131 /* c48676ef6b6f9c Daniel Jordan 2019-08-14 132 * KTASK_CTL_INITIALIZER casts 'thread_func' to be of type ktask_thread_func so c48676ef6b6f9c Daniel Jordan 2019-08-14 133 * clients can write cleaner thread functions by relieving them of the need to c48676ef6b6f9c Daniel Jordan 2019-08-14 134 * cast the three void * arguments. Clients can just use the actual argument c48676ef6b6f9c Daniel Jordan 2019-08-14 135 * types instead. c48676ef6b6f9c Daniel Jordan 2019-08-14 136 */ c48676ef6b6f9c Daniel Jordan 2019-08-14 137 #define DEFINE_KTASK_CTL(ctl_name, thread_func, func_arg, min_chunk_size) \ c48676ef6b6f9c Daniel Jordan 2019-08-14 138 struct ktask_ctl ctl_name = \ c48676ef6b6f9c Daniel Jordan 2019-08-14 139 KTASK_CTL_INITIALIZER(thread_func, func_arg, min_chunk_size) \ c48676ef6b6f9c Daniel Jordan 2019-08-14 140 c48676ef6b6f9c Daniel Jordan 2019-08-14 141 /** c48676ef6b6f9c Daniel Jordan 2019-08-14 142 * ktask_ctl_set_iter_func - Set a task-specific iterator c48676ef6b6f9c Daniel Jordan 2019-08-14 143 * c48676ef6b6f9c Daniel Jordan 2019-08-14 144 * Overrides the default iterator, ktask_iter_range. c48676ef6b6f9c Daniel Jordan 2019-08-14 145 * c48676ef6b6f9c Daniel Jordan 2019-08-14 146 * Casts the type of the iterator function so its arguments can be c48676ef6b6f9c Daniel Jordan 2019-08-14 147 * client-specific (see the comment above DEFINE_KTASK_CTL). c48676ef6b6f9c Daniel Jordan 2019-08-14 148 * c48676ef6b6f9c Daniel Jordan 2019-08-14 149 * @ctl: A control structure containing information about the task. c48676ef6b6f9c Daniel Jordan 2019-08-14 150 * @iter_func: Walks a given number of units forward in the task, returning c48676ef6b6f9c Daniel Jordan 2019-08-14 151 * an iterator corresponding to the new position. c48676ef6b6f9c Daniel Jordan 2019-08-14 152 */ c48676ef6b6f9c Daniel Jordan 2019-08-14 153 #define ktask_ctl_set_iter_func(ctl, iter_func) \ c48676ef6b6f9c Daniel Jordan 2019-08-14 154 ((ctl)->kc_iter_func = (ktask_iter_func)(iter_func)) c48676ef6b6f9c Daniel Jordan 2019-08-14 155 69cc5b58cc50d2 Daniel Jordan 2019-08-14 156 /** 69cc5b58cc50d2 Daniel Jordan 2019-08-14 157 * ktask_ctl_set_undo_func - Designate an undo function to unwind from error 69cc5b58cc50d2 Daniel Jordan 2019-08-14 158 * 69cc5b58cc50d2 Daniel Jordan 2019-08-14 159 * @ctl: A control structure containing information about the task. 69cc5b58cc50d2 Daniel Jordan 2019-08-14 160 * @undo_func: Undoes a piece of the task. 69cc5b58cc50d2 Daniel Jordan 2019-08-14 161 */ 69cc5b58cc50d2 Daniel Jordan 2019-08-14 162 #define ktask_ctl_set_undo_func(ctl, undo_func) \ 69cc5b58cc50d2 Daniel Jordan 2019-08-14 @163 ((ctl)->kc_undo_func = (ktask_undo_func)(undo_func)) 69cc5b58cc50d2 Daniel Jordan 2019-08-14 164 :::::: The code at line 123 was first introduced by commit :::::: c48676ef6b6f9cb8497d6264ae9ff71b87630337 ktask: multithread CPU-intensive kernel work :::::: TO: Daniel Jordan <daniel.m.jordan@oracle.com> :::::: CC: Xie XiuQi <xiexiuqi@huawei.com> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki