tree: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git dma-sync-rework head: 985cd64f3b17b82468e68c6269e09a5556d3720e commit: 985cd64f3b17b82468e68c6269e09a5556d3720e [22/22] dma-mapping: replace custom code with generic implementation config: hexagon-randconfig-r003-20230322 (https://download.01.org/0day-ci/archive/20230325/202303251901.qwqJQ37X-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 # https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git/commit/?id=985cd64f3b17b82468e68c6269e09a5556d3720e 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 985cd64f3b17b82468e68c6269e09a5556d3720e # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon 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/202303251901.qwqJQ37X-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): In file included from arch/hexagon/kernel/dma.c:8: In file included from include/linux/dma-map-ops.h:9: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/hexagon/include/asm/io.h:334: include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __raw_readb(PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu' #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) ^ In file included from arch/hexagon/kernel/dma.c:8: In file included from include/linux/dma-map-ops.h:9: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/hexagon/include/asm/io.h:334: include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) ^ In file included from arch/hexagon/kernel/dma.c:8: In file included from include/linux/dma-map-ops.h:9: In file included from include/linux/dma-mapping.h:10: In file included from include/linux/scatterlist.h:9: In file included from arch/hexagon/include/asm/io.h:334: include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writeb(value, PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ >> arch/hexagon/kernel/dma.c:19:27: error: use of undeclared identifier 'paddr' hexagon_inv_dcache_range(paddr, paddr + size); ^ arch/hexagon/kernel/dma.c:19:34: error: use of undeclared identifier 'paddr' hexagon_inv_dcache_range(paddr, paddr + size); ^ >> arch/hexagon/kernel/dma.c:24:2: error: call to undeclared function 'hexagon_flush_dcache_range'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] hexagon_flush_dcache_range(paddr, paddr + size); ^ arch/hexagon/kernel/dma.c:24:2: note: did you mean 'hexagon_clean_dcache_range'? arch/hexagon/include/asm/cacheflush.h:75:13: note: 'hexagon_clean_dcache_range' declared here extern void hexagon_clean_dcache_range(unsigned long start, unsigned long end); ^ arch/hexagon/kernel/dma.c:24:29: error: use of undeclared identifier 'paddr' hexagon_flush_dcache_range(paddr, paddr + size); ^ arch/hexagon/kernel/dma.c:24:36: error: use of undeclared identifier 'paddr' hexagon_flush_dcache_range(paddr, paddr + size); ^ 6 warnings and 5 errors generated. vim +/paddr +19 arch/hexagon/kernel/dma.c 16 17 static inline void arch_dma_cache_inv(phys_addr_t start, size_t size) 18 { > 19 hexagon_inv_dcache_range(paddr, paddr + size); 20 } 21 22 static inline void arch_dma_cache_wback_inv(phys_addr_t start, size_t size) 23 { > 24 hexagon_flush_dcache_range(paddr, paddr + size); 25 } 26 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
