tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: e48661230cc35b3d0f4367eddfc19f86463ab917 commit: fcaeb01929d7c4bfcaa2b374119d6a9a823d0dfe media: vivid: place the logic which disables ioctl on a separate function date: 8 months ago config: powerpc64-randconfig-r024-20210507 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project a3a8a1a15b524d91b5308db68e9d293b34cd88dd) 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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fcaeb01929d7c4bfcaa2b374119d6a9a823d0dfe git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout fcaeb01929d7c4bfcaa2b374119d6a9a823d0dfe # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=powerpc64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): __do_insb ^ arch/powerpc/include/asm/io.h:541:56: 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/test-drivers/vivid/vivid-core.c:20: In file included from include/media/videobuf2-vmalloc.h:16: In file included from include/media/videobuf2-v4l2.h:16: In file included from include/media/videobuf2-core.h:18: In file included from include/linux/dma-buf.h:18: In file included from include/linux/scatterlist.h:9: In file included from arch/powerpc/include/asm/io.h:604: 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:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:250:1: note: expanded from here __do_insw ^ arch/powerpc/include/asm/io.h:542:56: 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/test-drivers/vivid/vivid-core.c:20: In file included from include/media/videobuf2-vmalloc.h:16: In file included from include/media/videobuf2-v4l2.h:16: In file included from include/media/videobuf2-core.h:18: In file included from include/linux/dma-buf.h:18: In file included from include/linux/scatterlist.h:9: In file included from arch/powerpc/include/asm/io.h:604: 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:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:5:1: note: expanded from here __do_insl ^ arch/powerpc/include/asm/io.h:543:56: 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/test-drivers/vivid/vivid-core.c:20: In file included from include/media/videobuf2-vmalloc.h:16: In file included from include/media/videobuf2-v4l2.h:16: In file included from include/media/videobuf2-core.h:18: In file included from include/linux/dma-buf.h:18: In file included from include/linux/scatterlist.h:9: In file included from arch/powerpc/include/asm/io.h:604: 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:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:10:1: note: expanded from here __do_outsb ^ arch/powerpc/include/asm/io.h:544:58: 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/test-drivers/vivid/vivid-core.c:20: In file included from include/media/videobuf2-vmalloc.h:16: In file included from include/media/videobuf2-v4l2.h:16: In file included from include/media/videobuf2-core.h:18: In file included from include/linux/dma-buf.h:18: In file included from include/linux/scatterlist.h:9: In file included from arch/powerpc/include/asm/io.h:604: 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:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:15:1: note: expanded from here __do_outsw ^ arch/powerpc/include/asm/io.h:545:58: 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/test-drivers/vivid/vivid-core.c:20: In file included from include/media/videobuf2-vmalloc.h:16: In file included from include/media/videobuf2-v4l2.h:16: In file included from include/media/videobuf2-core.h:18: In file included from include/linux/dma-buf.h:18: In file included from include/linux/scatterlist.h:9: In file included from arch/powerpc/include/asm/io.h:604: 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:601:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ <scratch space>:20:1: note: expanded from here __do_outsl ^ arch/powerpc/include/asm/io.h:546:58: note: expanded from macro '__do_outsl' #define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ >> drivers/media/test-drivers/vivid/vivid-core.c:1883:12: warning: stack frame size of 2816 bytes in function 'vivid_probe' [-Wframe-larger-than=] static int vivid_probe(struct platform_device *pdev) ^ 13 warnings generated. vim +/vivid_probe +1883 drivers/media/test-drivers/vivid/vivid-core.c c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1878 c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1879 The real maximum number of virtual drivers will depend on how many drivers c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1880 will succeed. This is limited to the maximum number of devices that c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1881 videodev supports, which is equal to VIDEO_NUM_DEVICES. c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1882 */ f46d740fb025898 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2015-03-13 @1883 static int vivid_probe(struct platform_device *pdev) c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1884 { c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1885 const struct font_desc *font = find_font("VGA8x16"); c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1886 int ret = 0, i; c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1887 c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1888 if (font == NULL) { c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1889 pr_err("vivid: could not find font\n"); c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1890 return -ENODEV; c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1891 } c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1892 c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1893 tpg_set_font(font->data); c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1894 c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1895 n_devs = clamp_t(unsigned, n_devs, 1, VIVID_MAX_DEVS); c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1896 c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1897 for (i = 0; i < n_devs; i++) { f46d740fb025898 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2015-03-13 1898 ret = vivid_create_instance(pdev, i); c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1899 if (ret) { c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1900 /* If some instantiations succeeded, keep driver */ c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1901 if (i) c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1902 ret = 0; c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1903 break; c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1904 } c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1905 } c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1906 c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1907 if (ret < 0) { c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1908 pr_err("vivid: error %d while loading driver\n", ret); c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1909 return ret; c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1910 } c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1911 c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1912 /* n_devs will reflect the actual number of allocated devices */ c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1913 n_devs = i; c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1914 c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1915 return ret; c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1916 } c88a96b023d8239 drivers/media/platform/vivid/vivid-core.c Hans Verkuil 2014-08-25 1917 :::::: The code at line 1883 was first introduced by commit :::::: f46d740fb0258982f00ffdbddc6486e674edafb5 [media] vivid: turn this into a platform_device :::::: TO: Hans Verkuil <hans.verkuil@xxxxxxxxx> :::::: CC: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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