[kbuild-all] [hch-misc:swiotlb-init-cleanup 8/9] arch/x86/kernel/pci-swiotlb.c:19:19: warning: declaration specifier missing, defaulting to 'int'

tree: git://git.infradead.org/users/hch/misc.git swiotlb-init-cleanup head: 3a793a9dab917734e620d2806265aff8c0228fa4 commit: ef34052a1649b34ac0d609aacd6f610f818ec5f0 [8/9] swiotlb: make the swiotlb_init interface more useful config: x86_64-randconfig-a005 (https://download.01.org/0day-ci/archive/20220215/202202150231.OIUAqkov-lk...) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project ea071884b0cc7210b3cc5fe858f0e892a779a23b) 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 remote add hch-misc git://git.infradead.org/users/hch/misc.git git fetch --no-tags hch-misc swiotlb-init-cleanup git checkout ef34052a1649b34ac0d609aacd6f610f818ec5f0 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kernel/ kernel/dma/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): arch/x86/kernel/pci-swiotlb.c:19:1: error: pasting formed '__iommu_entry_(', an invalid preprocessing token IOMMU_INIT_FINISH(NULL, ^ arch/x86/include/asm/iommu_table.h:91:2: note: expanded from macro 'IOMMU_INIT_FINISH' __IOMMU_INIT(_detect, _depend, _init, _late_init, 1) ^ arch/x86/include/asm/iommu_table.h:53:17: note: expanded from macro '__IOMMU_INIT' __iommu_entry_##_detect __used \ ^ IOMMU_INIT_FINISH(NULL, ^ include/linux/stddef.h:8:16: note: expanded from macro 'NULL' #define NULL ((void *)0) ^ arch/x86/kernel/pci-swiotlb.c:19:19: error: expected ')' include/linux/stddef.h:8:23: note: expanded from macro 'NULL' #define NULL ((void *)0) ^ arch/x86/kernel/pci-swiotlb.c:19:19: note: to match this '(' include/linux/stddef.h:8:14: note: expanded from macro 'NULL' #define NULL ((void *)0) ^ IOMMU_INIT_FINISH(NULL, ^ arch/x86/include/asm/iommu_table.h:91:2: note: expanded from macro 'IOMMU_INIT_FINISH' __IOMMU_INIT(_detect, _depend, _init, _late_init, 1) ^ arch/x86/include/asm/iommu_table.h:52:9: note: expanded from macro '__IOMMU_INIT' static const struct iommu_table_entry \ ^ arch/x86/kernel/pci-swiotlb.c:19:1: error: illegal initializer (only variables can be initialized) arch/x86/include/asm/iommu_table.h:91:2: note: expanded from macro 'IOMMU_INIT_FINISH' __IOMMU_INIT(_detect, _depend, _init, _late_init, 1) ^ arch/x86/include/asm/iommu_table.h:53:3: note: expanded from macro '__IOMMU_INIT' __iommu_entry_##_detect __used \ ^ arch/x86/include/asm/iommu_table.h:53:3: note: expanded from macro '__iommu_entry_' arch/x86/kernel/pci-swiotlb.c:44:5: error: use of undeclared identifier 'pci_swiotlb_detect_override'; did you mean 'pci_swiotlb_detect_4gb'? pci_swiotlb_detect_override, ^~~~~~~~~~~~~~~~~~~~~~~~~~~ pci_swiotlb_detect_4gb arch/x86/include/asm/iommu_table.h:94:24: note: expanded from macro 'IOMMU_INIT' __IOMMU_INIT(_detect, _depend, _init, _late_init, 0) ^ arch/x86/include/asm/iommu_table.h:56:14: note: expanded from macro '__IOMMU_INIT' = {_detect, _depend, _early_init, _late_init, \ ^ arch/x86/kernel/pci-swiotlb.c:28:12: note: 'pci_swiotlb_detect_4gb' declared here int __init pci_swiotlb_detect_4gb(void) ^ arch/x86/kernel/pci-swiotlb.c:43:1: error: '__iommu_entry_pci_swiotlb_detect_4gb' causes a section type conflict with '__iommu_entry_' IOMMU_INIT(pci_swiotlb_detect_4gb, ^ arch/x86/include/asm/iommu_table.h:94:2: note: expanded from macro 'IOMMU_INIT' __IOMMU_INIT(_detect, _depend, _init, _late_init, 0) ^ arch/x86/include/asm/iommu_table.h:53:3: note: expanded from macro '__IOMMU_INIT' __iommu_entry_##_detect __used \ ^ <scratch space>:175:1: note: expanded from here __iommu_entry_pci_swiotlb_detect_4gb ^ arch/x86/kernel/pci-swiotlb.c:19:1: note: declared here IOMMU_INIT_FINISH(NULL, ^ arch/x86/include/asm/iommu_table.h:91:2: note: expanded from macro 'IOMMU_INIT_FINISH' __IOMMU_INIT(_detect, _depend, _init, _late_init, 1) ^ arch/x86/include/asm/iommu_table.h:53:3: note: expanded from macro '__IOMMU_INIT' __iommu_entry_##_detect __used \ ^ arch/x86/include/asm/iommu_table.h:53:3: note: expanded from macro '__iommu_entry_' 2 warnings and 5 errors generated. vim +/int +19 arch/x86/kernel/pci-swiotlb.c 18 20 pci_xen_swiotlb_detect, 21 pci_swiotlb_init, 22 pci_swiotlb_late_init); 23 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org