tree: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git dma-sync-rework head: 985cd64f3b17b82468e68c6269e09a5556d3720e commit: a0183b361d4212de180444305367f20ad14f89fd [7/22] powerpc: dma-mapping: split out cache operation logic config: powerpc-obs600_defconfig (https://download.01.org/0day-ci/archive/20230325/202303251834.xlyWtsTh-lkp@xxxxxxxxx/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7) 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 # install powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git/commit/?id=a0183b361d4212de180444305367f20ad14f89fd git remote add arnd-asm-generic https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git git fetch --no-tags arnd-asm-generic dma-sync-rework git checkout a0183b361d4212de180444305367f20ad14f89fd # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202303251834.xlyWtsTh-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): __do_insb ^ arch/powerpc/include/asm/io.h:577:56: note: expanded from macro '__do_insb' #define __do_insb(p, b, n) readsb((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from arch/powerpc/mm/dma-noncoherent.c:12: In file included from include/linux/highmem.h:12: In file included from include/linux/hardirq.h:11: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:640: arch/powerpc/include/asm/io-defs.h:45:1: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(insw, (unsigned long p, void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:637:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:186:1: note: expanded from here __do_insw ^ arch/powerpc/include/asm/io.h:578:56: note: expanded from macro '__do_insw' #define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from arch/powerpc/mm/dma-noncoherent.c:12: In file included from include/linux/highmem.h:12: In file included from include/linux/hardirq.h:11: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:640: arch/powerpc/include/asm/io-defs.h:47:1: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(insl, (unsigned long p, void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:637:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:188:1: note: expanded from here __do_insl ^ arch/powerpc/include/asm/io.h:579:56: note: expanded from macro '__do_insl' #define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from arch/powerpc/mm/dma-noncoherent.c:12: In file included from include/linux/highmem.h:12: In file included from include/linux/hardirq.h:11: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:640: arch/powerpc/include/asm/io-defs.h:49:1: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsb, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:637:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:190:1: note: expanded from here __do_outsb ^ arch/powerpc/include/asm/io.h:580:58: note: expanded from macro '__do_outsb' #define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from arch/powerpc/mm/dma-noncoherent.c:12: In file included from include/linux/highmem.h:12: In file included from include/linux/hardirq.h:11: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:640: arch/powerpc/include/asm/io-defs.h:51:1: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsw, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:637:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:192:1: note: expanded from here __do_outsw ^ arch/powerpc/include/asm/io.h:581:58: note: expanded from macro '__do_outsw' #define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ In file included from arch/powerpc/mm/dma-noncoherent.c:12: In file included from include/linux/highmem.h:12: In file included from include/linux/hardirq.h:11: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: In file included from arch/powerpc/include/asm/io.h:640: arch/powerpc/include/asm/io-defs.h:53:1: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsl, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:637:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:194:1: note: expanded from here __do_outsl ^ arch/powerpc/include/asm/io.h:582:58: note: expanded from macro '__do_outsl' #define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ >> arch/powerpc/mm/dma-noncoherent.c:91:59: error: must use 'enum' tag to refer to type 'dma_cache_op' static void __dma_phys_op(phys_addr_t paddr, size_t size, dma_cache_op op) ^ enum arch/powerpc/mm/dma-noncoherent.c:107:10: error: use of undeclared identifier 'direction' switch (direction) { ^ >> arch/powerpc/mm/dma-noncoherent.c:115:8: error: use of undeclared identifier 'start'; did you mean 'short'? if ((start | end) & (L1_CACHE_BYTES - 1)) ^~~~~ short arch/powerpc/mm/dma-noncoherent.c:115:8: error: expected expression arch/powerpc/mm/dma-noncoherent.c:116:18: error: use of undeclared identifier 'start' __dma_phys_op(start, end, DMA_CACHE_FLUSH); ^ >> arch/powerpc/mm/dma-noncoherent.c:116:25: error: use of undeclared identifier 'end' __dma_phys_op(start, end, DMA_CACHE_FLUSH); ^ arch/powerpc/mm/dma-noncoherent.c:118:18: error: use of undeclared identifier 'start' __dma_phys_op(start, end, DMA_CACHE_INVAL); ^ arch/powerpc/mm/dma-noncoherent.c:118:25: error: use of undeclared identifier 'end' __dma_phys_op(start, end, DMA_CACHE_INVAL); ^ arch/powerpc/mm/dma-noncoherent.c:121:17: error: use of undeclared identifier 'start' __dma_phys_op(start, end, DMA_CACHE_CLEAN); ^ arch/powerpc/mm/dma-noncoherent.c:121:24: error: use of undeclared identifier 'end' __dma_phys_op(start, end, DMA_CACHE_CLEAN); ^ arch/powerpc/mm/dma-noncoherent.c:124:17: error: use of undeclared identifier 'start' __dma_phys_op(start, end, DMA_CACHE_FLUSH); ^ arch/powerpc/mm/dma-noncoherent.c:124:24: error: use of undeclared identifier 'end' __dma_phys_op(start, end, DMA_CACHE_FLUSH); ^ arch/powerpc/mm/dma-noncoherent.c:132:10: error: use of undeclared identifier 'direction' switch (direction) { ^ fatal error: too many errors emitted, stopping now [-ferror-limit=] 20 errors generated. vim +91 arch/powerpc/mm/dma-noncoherent.c 86 87 /* 88 * __dma_phys_op makes memory consistent. identical to __dma_op, but 89 * takes a phys_addr_t instead of a virtual address 90 */ > 91 static void __dma_phys_op(phys_addr_t paddr, size_t size, dma_cache_op op) 92 { 93 struct page *page = pfn_to_page(paddr >> PAGE_SHIFT); 94 unsigned offset = paddr & ~PAGE_MASK; 95 96 #ifdef CONFIG_HIGHMEM 97 __dma_highmem_op(page, offset, size, op); 98 #else 99 unsigned long start = (unsigned long)page_address(page) + offset; 100 __dma_op((void *)start, size, op); 101 #endif 102 } 103 104 void arch_sync_dma_for_device(phys_addr_t paddr, size_t size, 105 enum dma_data_direction dir) 106 { 107 switch (direction) { 108 case DMA_NONE: 109 BUG(); 110 case DMA_FROM_DEVICE: 111 /* 112 * invalidate only when cache-line aligned otherwise there is 113 * the potential for discarding uncommitted data from the cache 114 */ > 115 if ((start | end) & (L1_CACHE_BYTES - 1)) > 116 __dma_phys_op(start, end, DMA_CACHE_FLUSH); 117 else 118 __dma_phys_op(start, end, DMA_CACHE_INVAL); 119 break; 120 case DMA_TO_DEVICE: /* writeback only */ 121 __dma_phys_op(start, end, DMA_CACHE_CLEAN); 122 break; 123 case DMA_BIDIRECTIONAL: /* writeback and invalidate */ 124 __dma_phys_op(start, end, DMA_CACHE_FLUSH); 125 break; 126 } 127 } 128 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
