Hi Claire, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 3579aa488520feeda433ceca23ef4704bf8cd280 commit: 461021875c5057b3a408db0aa91b15119064ffa8 [12564/13831] swiotlb: Add restricted DMA pool initialization config: h8300-randconfig-r004-20210628 (attached as .config) compiler: h8300-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 # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=461021875c5057b3a408db0aa91b15119064ffa8 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 461021875c5057b3a408db0aa91b15119064ffa8 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=h8300 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): kernel/dma/swiotlb.c: In function 'rmem_swiotlb_device_init': >> kernel/dma/swiotlb.c:771:5: error: implicit declaration of function 'debugfs_create_dir'; did you mean 'kernfs_create_dir'? [-Werror=implicit-function-declaration] 771 | debugfs_create_dir(rmem->name, debugfs_dir); | ^~~~~~~~~~~~~~~~~~ | kernfs_create_dir >> kernel/dma/swiotlb.c:771:36: error: 'debugfs_dir' undeclared (first use in this function) 771 | debugfs_create_dir(rmem->name, debugfs_dir); | ^~~~~~~~~~~ kernel/dma/swiotlb.c:771:36: note: each undeclared identifier is reported only once for each function it appears in >> kernel/dma/swiotlb.c:772:4: error: implicit declaration of function 'swiotlb_create_debugfs_files' [-Werror=implicit-function-declaration] 772 | swiotlb_create_debugfs_files(mem); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +771 kernel/dma/swiotlb.c 744 745 static int rmem_swiotlb_device_init(struct reserved_mem *rmem, 746 struct device *dev) 747 { 748 struct io_tlb_mem *mem = rmem->priv; 749 unsigned long nslabs = rmem->size >> IO_TLB_SHIFT; 750 751 /* 752 * Since multiple devices can share the same pool, the private data, 753 * io_tlb_mem struct, will be initialized by the first device attached 754 * to it. 755 */ 756 if (!mem) { 757 mem = kzalloc(struct_size(mem, slots, nslabs), GFP_KERNEL); 758 if (!mem) 759 return -ENOMEM; 760 761 set_memory_decrypted((unsigned long)phys_to_virt(rmem->base), 762 rmem->size >> PAGE_SHIFT); 763 swiotlb_init_io_tlb_mem(mem, rmem->base, nslabs, false); 764 mem->force_bounce = true; 765 mem->for_alloc = true; 766 767 rmem->priv = mem; 768 769 if (IS_ENABLED(CONFIG_DEBUG_FS)) { 770 mem->debugfs = > 771 debugfs_create_dir(rmem->name, debugfs_dir); > 772 swiotlb_create_debugfs_files(mem); 773 } 774 } 775 776 dev->dma_io_tlb_mem = mem; 777 778 return 0; 779 } 780 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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