Hi Muhammad, kernel test robot noticed the following build warnings: [auto build test WARNING on akpm-mm/mm-everything] [also build test WARNING on next-20230613] [cannot apply to linus/master v6.4-rc6] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Muhammad-Usama-Anjum/userfaultfd-UFFD_FEATURE_WP_ASYNC/20230613-183334 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20230613102905.2808371-3-usama.anjum%40collabora.com patch subject: [PATCH v18 2/5] fs/proc/task_mmu: Implement IOCTL to get and optionally clear info about PTEs config: hexagon-randconfig-r041-20230612 (https://download.01.org/0day-ci/archive/20230613/202306132324.Npiix2ct-lkp@xxxxxxxxx/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a) reproduce (this is a W=1 build): mkdir -p ~/bin wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git git fetch akpm-mm mm-everything git checkout akpm-mm/mm-everything b4 shazam https://lore.kernel.org/r/20230613102905.2808371-3-usama.anjum@xxxxxxxxxxxxx # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=hexagon olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash fs/proc/ If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202306132324.Npiix2ct-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from fs/proc/task_mmu.c:3: In file included from include/linux/mm_inline.h:7: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: 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] 547 | 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] 560 | 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' 37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x)) | ^ In file included from fs/proc/task_mmu.c:3: In file included from include/linux/mm_inline.h:7: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: 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] 573 | 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' 35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x)) | ^ In file included from fs/proc/task_mmu.c:3: In file included from include/linux/mm_inline.h:7: In file included from include/linux/swap.h:9: In file included from include/linux/memcontrol.h:13: In file included from include/linux/cgroup.h:26: In file included from include/linux/kernel_stat.h:9: In file included from include/linux/interrupt.h:11: In file included from include/linux/hardirq.h:11: In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1: In file included from include/asm-generic/hardirq.h:17: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: 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] 584 | __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] 594 | __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] 604 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ >> fs/proc/task_mmu.c:1866:18: warning: shift count >= width of type [-Wshift-count-overflow] 1866 | if ((p->flags & PM_SCAN_OP_WRITE) && (!userfaultfd_wp_async(vma) || | ^~~~~~~~~~~~~~~~ fs/proc/task_mmu.c:1769:26: note: expanded from macro 'PM_SCAN_OP_WRITE' 1769 | #define PM_SCAN_OP_WRITE BIT(63) | ^~~~~~~ include/vdso/bits.h:7:26: note: expanded from macro 'BIT' 7 | #define BIT(nr) (UL(1) << (nr)) | ^ ~~~~ fs/proc/task_mmu.c:2102:22: warning: shift count >= width of type [-Wshift-count-overflow] 2102 | PAGE_IS_WRITTEN) ? PM_SCAN_OP_WRITE : 0; | ^~~~~~~~~~~~~~~~ fs/proc/task_mmu.c:1769:26: note: expanded from macro 'PM_SCAN_OP_WRITE' 1769 | #define PM_SCAN_OP_WRITE BIT(63) | ^~~~~~~ include/vdso/bits.h:7:26: note: expanded from macro 'BIT' 7 | #define BIT(nr) (UL(1) << (nr)) | ^ ~~~~ 8 warnings generated. vim +1866 fs/proc/task_mmu.c 1859 1860 static int pagemap_scan_test_walk(unsigned long start, unsigned long end, 1861 struct mm_walk *walk) 1862 { 1863 struct pagemap_scan_private *p = walk->private; 1864 struct vm_area_struct *vma = walk->vma; 1865 > 1866 if ((p->flags & PM_SCAN_OP_WRITE) && (!userfaultfd_wp_async(vma) || 1867 !userfaultfd_wp_use_markers(vma))) 1868 return -EPERM; 1869 1870 if (vma->vm_flags & VM_PFNMAP) 1871 return 1; 1872 1873 return 0; 1874 } 1875 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
