Hi Mauro, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: d888c83fcec75194a8a48ccd283953bdba7b2550 commit: 95495f2aa9d8df1a7697bab24118544d3568f41d media: platform: place Intel drivers on a separate dir date: 2 weeks ago config: s390-randconfig-r036-20220330 (https://download.01.org/0day-ci/archive/20220331/202203310219.HvAOIHBC-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 0f6d9501cf49ce02937099350d08f20c4af86f3d) 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 s390 cross compiling tool for clang build # apt-get install binutils-s390x-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=95495f2aa9d8df1a7697bab24118544d3568f41d git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 95495f2aa9d8df1a7697bab24118544d3568f41d # 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=s390 SHELL=/bin/bash drivers/media/platform/intel/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): In file included from drivers/media/platform/intel/pxa_camera.c:12: In file included from include/linux/io.h:13: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:464:31: 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:477:61: 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/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu' #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x)) ^ include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16' #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x)) ^ In file included from drivers/media/platform/intel/pxa_camera.c:12: In file included from include/linux/io.h:13: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:490:61: 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/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32' #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x)) ^ In file included from drivers/media/platform/intel/pxa_camera.c:12: In file included from include/linux/io.h:13: In file included from arch/s390/include/asm/io.h:75: include/asm-generic/io.h:501:33: 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:511:59: 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:521:59: 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); ~~~~~~~~~~ ^ include/asm-generic/io.h:609:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:617:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:625:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:634:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:643:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ >> drivers/media/platform/intel/pxa_camera.c:2449:34: warning: unused variable 'pxa_camera_of_match' [-Wunused-const-variable] static const struct of_device_id pxa_camera_of_match[] = { ^ 13 warnings generated. vim +/pxa_camera_of_match +2449 drivers/media/platform/intel/pxa_camera.c 7254026cedd42d drivers/media/video/pxa_camera.c Guennadi Liakhovetski 2011-06-29 2448 e9a1d94fa85542 drivers/media/platform/soc_camera/pxa_camera.c Robert Jarzmik 2014-06-29 @2449 static const struct of_device_id pxa_camera_of_match[] = { e9a1d94fa85542 drivers/media/platform/soc_camera/pxa_camera.c Robert Jarzmik 2014-06-29 2450 { .compatible = "marvell,pxa270-qci", }, e9a1d94fa85542 drivers/media/platform/soc_camera/pxa_camera.c Robert Jarzmik 2014-06-29 2451 {}, e9a1d94fa85542 drivers/media/platform/soc_camera/pxa_camera.c Robert Jarzmik 2014-06-29 2452 }; e9a1d94fa85542 drivers/media/platform/soc_camera/pxa_camera.c Robert Jarzmik 2014-06-29 2453 MODULE_DEVICE_TABLE(of, pxa_camera_of_match); e9a1d94fa85542 drivers/media/platform/soc_camera/pxa_camera.c Robert Jarzmik 2014-06-29 2454 :::::: The code at line 2449 was first introduced by commit :::::: e9a1d94fa85542d4f3046ac82d234a3c8349c948 [media] media: pxa_camera device-tree support :::::: TO: Robert Jarzmik <robert.jarzmik@xxxxxxx> :::::: CC: Mauro Carvalho Chehab <m.chehab@xxxxxxxxxxx> -- 0-DAY CI Kernel Test Service https://01.org/lkp
