tree: https://github.com/0day-ci/linux/commits/UPDATE-20210116-031938/Ezequiel-... head: c752661bf6a21030f30dc4fc93b895e68dc23fcd commit: c752661bf6a21030f30dc4fc93b895e68dc23fcd media: v4l2-async: Add waiting subdevices debugfs date: 2 hours ago config: powerpc64-randconfig-r016-20210115 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 5b42fd8dd4e7e29125a09a41a33af7c9cb57d144) 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 powerpc64 cross compiling tool for clang build # apt-get install binutils-powerpc64-linux-gnu # https://github.com/0day-ci/linux/commit/c752661bf6a21030f30dc4fc93b895e68... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review UPDATE-20210116-031938/Ezequiel-Garcia/media-v4l2-async-Remove-V4L2_ASYNC_MATCH_CUSTOM/20210109-012059 git checkout c752661bf6a21030f30dc4fc93b895e68dc23fcd # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 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 >>): __do_insb ^ arch/powerpc/include/asm/io.h:556:56: 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 drivers/media/v4l2-core/v4l2-async.c:23: In file included from include/media/v4l2-device.h:13: In file included from include/media/v4l2-subdev.h:15: In file included from include/media/v4l2-common.h:270: In file included from include/linux/spi/spi.h:14: In file included from include/linux/scatterlist.h:9: In file included from arch/powerpc/include/asm/io.h:619: arch/powerpc/include/asm/io-defs.h:45:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(insw, (unsigned long p, void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:178:1: note: expanded from here __do_insw ^ arch/powerpc/include/asm/io.h:557:56: 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 drivers/media/v4l2-core/v4l2-async.c:23: In file included from include/media/v4l2-device.h:13: In file included from include/media/v4l2-subdev.h:15: In file included from include/media/v4l2-common.h:270: In file included from include/linux/spi/spi.h:14: In file included from include/linux/scatterlist.h:9: In file included from arch/powerpc/include/asm/io.h:619: arch/powerpc/include/asm/io-defs.h:47:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(insl, (unsigned long p, void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:180:1: note: expanded from here __do_insl ^ arch/powerpc/include/asm/io.h:558:56: 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 drivers/media/v4l2-core/v4l2-async.c:23: In file included from include/media/v4l2-device.h:13: In file included from include/media/v4l2-subdev.h:15: In file included from include/media/v4l2-common.h:270: In file included from include/linux/spi/spi.h:14: In file included from include/linux/scatterlist.h:9: In file included from arch/powerpc/include/asm/io.h:619: arch/powerpc/include/asm/io-defs.h:49:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsb, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:182:1: note: expanded from here __do_outsb ^ arch/powerpc/include/asm/io.h:559:58: 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 drivers/media/v4l2-core/v4l2-async.c:23: In file included from include/media/v4l2-device.h:13: In file included from include/media/v4l2-subdev.h:15: In file included from include/media/v4l2-common.h:270: In file included from include/linux/spi/spi.h:14: In file included from include/linux/scatterlist.h:9: In file included from arch/powerpc/include/asm/io.h:619: arch/powerpc/include/asm/io-defs.h:51:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsw, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:184:1: note: expanded from here __do_outsw ^ arch/powerpc/include/asm/io.h:560:58: 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 drivers/media/v4l2-core/v4l2-async.c:23: In file included from include/media/v4l2-device.h:13: In file included from include/media/v4l2-subdev.h:15: In file included from include/media/v4l2-common.h:270: In file included from include/linux/spi/spi.h:14: In file included from include/linux/scatterlist.h:9: In file included from arch/powerpc/include/asm/io.h:619: arch/powerpc/include/asm/io-defs.h:53:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] DEF_PCI_AC_NORET(outsl, (unsigned long p, const void *b, unsigned long c), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/include/asm/io.h:616:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:186:1: note: expanded from here __do_outsl ^ arch/powerpc/include/asm/io.h:561:58: note: expanded from macro '__do_outsl' #define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ switch (asd->match_type) { ^ 7 warnings generated. vim +846 drivers/media/v4l2-core/v4l2-async.c 842 843 static void print_waiting_subdev(struct seq_file *s, 844 struct v4l2_async_subdev *asd) 845 { 847 case V4L2_ASYNC_MATCH_I2C: 848 seq_printf(s, " [i2c] dev=%d-%04x\n", asd->match.i2c.adapter_id, 849 asd->match.i2c.address); 850 break; 851 case V4L2_ASYNC_MATCH_FWNODE: { 852 struct fwnode_handle *devnode, *fwnode = asd->match.fwnode; 853 854 devnode = fwnode_graph_is_endpoint(fwnode) ? 855 fwnode_graph_get_port_parent(fwnode) : 856 fwnode_handle_get(fwnode); 857 858 seq_printf(s, " [fwnode] dev=%s, node=%pfw\n", 859 devnode->dev ? dev_name(devnode->dev) : "nil", 860 fwnode); 861 862 fwnode_handle_put(devnode); 863 break; 864 } 865 } 866 } 867 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org