On Sun, 12 Nov 2023 12:52:00 +0800 kernel test robot <lkp@xxxxxxxxx> wrote: > Hi Matthew, > > kernel test robot noticed the following build errors: > > [auto build test ERROR on akpm-mm/mm-everything] > [also build test ERROR on linus/master next-20231110] > [cannot apply to v6.6] > [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/Matthew-Wilcox-Oracle/buffer-Return-bool-from-grow_dev_folio/20231110-051651 > base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything > patch link: https://lore.kernel.org/r/20231109210608.2252323-4-willy%40infradead.org > patch subject: [PATCH v2 3/7] buffer: Fix grow_buffers() for block size > PAGE_SIZE > config: hexagon-comet_defconfig (https://download.01.org/0day-ci/archive/20231112/202311121240.AN8GbAbe-lkp@xxxxxxxxx/config) > compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07) > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231112/202311121240.AN8GbAbe-lkp@xxxxxxxxx/reproduce) > > 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/202311121240.AN8GbAbe-lkp@xxxxxxxxx/ > > All errors (new ones prefixed by >>): > > >> ld.lld: error: undefined symbol: __muloti4 > >>> referenced by buffer.c > >>> fs/buffer.o:(bdev_getblk) in archive vmlinux.a > >>> referenced by buffer.c > >>> fs/buffer.o:(bdev_getblk) in archive vmlinux.a > What a peculiar compiler. I assume this fixes? --- a/fs/buffer.c~buffer-fix-grow_buffers-for-block-size-page_size-fix +++ a/fs/buffer.c @@ -1099,7 +1099,7 @@ static bool grow_buffers(struct block_de } /* Create a folio with the proper size buffers */ - return grow_dev_folio(bdev, block, pos / PAGE_SIZE, size, gfp); + return grow_dev_folio(bdev, block, pos >> PAGE_SHIFT, size, gfp); } static struct buffer_head * _
