tree: git://git.infradead.org/users/hch/misc.git dma-bypass.4 head: 2073a4dddd7b63267146608d05038565a3437a71 commit: d3fc752999c386989dbd035458582db0dc1eab6a [7/9] dma-mapping: make support for dma ops optional config: ia64-randconfig-r023-20200708 (attached as .config) compiler: ia64-linux-gcc (GCC) 9.3.0 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 git checkout d3fc752999c386989dbd035458582db0dc1eab6a # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): drivers/misc/mic/bus/vop_bus.c: In function 'vop_register_device': 148 | vdev->dev.dma_ops = dma_ops; | ^ -- In file included from drivers/misc/mic/vop/vop_main.h:20, from drivers/misc/mic/vop/vop_debugfs.c:12: 103 | const struct dma_map_ops *dma_ops, | ^~~~~~~~~~~ vim +148 drivers/misc/mic/bus/vop_bus.c a19ddd6fd260d6 Sudeep Dutt 2016-02-08 131 a19ddd6fd260d6 Sudeep Dutt 2016-02-08 132 struct vop_device * a19ddd6fd260d6 Sudeep Dutt 2016-02-08 133 vop_register_device(struct device *pdev, int id, a19ddd6fd260d6 Sudeep Dutt 2016-02-08 134 const struct dma_map_ops *dma_ops, a19ddd6fd260d6 Sudeep Dutt 2016-02-08 135 struct vop_hw_ops *hw_ops, u8 dnode, struct mic_mw *aper, a19ddd6fd260d6 Sudeep Dutt 2016-02-08 136 struct dma_chan *chan) a19ddd6fd260d6 Sudeep Dutt 2016-02-08 137 { a19ddd6fd260d6 Sudeep Dutt 2016-02-08 138 int ret; a19ddd6fd260d6 Sudeep Dutt 2016-02-08 139 struct vop_device *vdev; a19ddd6fd260d6 Sudeep Dutt 2016-02-08 140 a19ddd6fd260d6 Sudeep Dutt 2016-02-08 141 vdev = kzalloc(sizeof(*vdev), GFP_KERNEL); a19ddd6fd260d6 Sudeep Dutt 2016-02-08 142 if (!vdev) a19ddd6fd260d6 Sudeep Dutt 2016-02-08 143 return ERR_PTR(-ENOMEM); a19ddd6fd260d6 Sudeep Dutt 2016-02-08 144 a19ddd6fd260d6 Sudeep Dutt 2016-02-08 145 vdev->dev.parent = pdev; a19ddd6fd260d6 Sudeep Dutt 2016-02-08 146 vdev->id.device = id; a19ddd6fd260d6 Sudeep Dutt 2016-02-08 147 vdev->id.vendor = VOP_DEV_ANY_ID; 5657933dbb6e25 Bart Van Assche 2017-01-20 @148 vdev->dev.dma_ops = dma_ops; a19ddd6fd260d6 Sudeep Dutt 2016-02-08 149 vdev->dev.dma_mask = &vdev->dev.coherent_dma_mask; a19ddd6fd260d6 Sudeep Dutt 2016-02-08 150 dma_set_mask(&vdev->dev, DMA_BIT_MASK(64)); a19ddd6fd260d6 Sudeep Dutt 2016-02-08 151 vdev->dev.release = vop_release_dev; a19ddd6fd260d6 Sudeep Dutt 2016-02-08 152 vdev->hw_ops = hw_ops; a19ddd6fd260d6 Sudeep Dutt 2016-02-08 153 vdev->dev.bus = &vop_bus; a19ddd6fd260d6 Sudeep Dutt 2016-02-08 154 vdev->dnode = dnode; a19ddd6fd260d6 Sudeep Dutt 2016-02-08 155 vdev->aper = aper; a19ddd6fd260d6 Sudeep Dutt 2016-02-08 156 vdev->dma_ch = chan; a19ddd6fd260d6 Sudeep Dutt 2016-02-08 157 vdev->index = dnode - 1; a19ddd6fd260d6 Sudeep Dutt 2016-02-08 158 dev_set_name(&vdev->dev, "vop-dev%u", vdev->index); a19ddd6fd260d6 Sudeep Dutt 2016-02-08 159 /* a19ddd6fd260d6 Sudeep Dutt 2016-02-08 160 * device_register() causes the bus infrastructure to look for a a19ddd6fd260d6 Sudeep Dutt 2016-02-08 161 * matching driver. a19ddd6fd260d6 Sudeep Dutt 2016-02-08 162 */ a19ddd6fd260d6 Sudeep Dutt 2016-02-08 163 ret = device_register(&vdev->dev); a19ddd6fd260d6 Sudeep Dutt 2016-02-08 164 if (ret) a19ddd6fd260d6 Sudeep Dutt 2016-02-08 165 goto free_vdev; a19ddd6fd260d6 Sudeep Dutt 2016-02-08 166 return vdev; a19ddd6fd260d6 Sudeep Dutt 2016-02-08 167 free_vdev: 5fbe9f35dfcd83 Arvind Yadav 2018-03-12 168 put_device(&vdev->dev); a19ddd6fd260d6 Sudeep Dutt 2016-02-08 169 return ERR_PTR(ret); a19ddd6fd260d6 Sudeep Dutt 2016-02-08 170 } a19ddd6fd260d6 Sudeep Dutt 2016-02-08 171 EXPORT_SYMBOL_GPL(vop_register_device); a19ddd6fd260d6 Sudeep Dutt 2016-02-08 172 :::::: The code at line 148 was first introduced by commit :::::: 5657933dbb6e25feaf5d8df8c88f96cdade693a3 treewide: Move dma_ops from struct dev_archdata into struct device :::::: TO: Bart Van Assche <bart.vanassche(a)sandisk.com&gt; :::::: CC: Doug Ledford <dledford(a)redhat.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org