Messages in this thread | | | Date | Thu, 17 Mar 2022 11:24:56 +0300 | From | Dan Carpenter <> | Subject | [kbuild] [gfs2:for-next 9/11] fs/gfs2/file.c:796:24: sparse: unsigned int * |
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git for-next head: a20050c14edf19add5a9588cb196bb00aa410650 commit: 165d142ffacdef3e620819a1031df3d896aa29ab [9/11] gfs2: Fix should_fault_in_pages() logic config: sh-randconfig-s032-20220313 (https://download.01.org/0day-ci/archive/20220317/202203170954.vFlMcTje-lkp@intel.com/config ) compiler: sh4-linux-gcc (GCC) 11.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git/commit/?id=165d142ffacdef3e620819a1031df3d896aa29ab git remote add gfs2 https://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2.git git fetch --no-tags gfs2 for-next git checkout 165d142ffacdef3e620819a1031df3d896aa29ab # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=sh SHELL=/bin/bash fs/gfs2/
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@intel.com>
sparse warnings: (new ones prefixed by >>) fs/gfs2/file.c:796:24: sparse: sparse: incompatible types in comparison expression (different signedness): >> fs/gfs2/file.c:796:24: sparse: unsigned int * fs/gfs2/file.c:796:24: sparse: int * >> fs/gfs2/file.c:796:24: sparse: sparse: cannot size expression
vim +796 fs/gfs2/file.c
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 773 static inline bool should_fault_in_pages(ssize_t ret, struct iov_iter *i, 00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 774 size_t *prev_count, 00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 775 size_t *window_size) 00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 776 { 00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 777 size_t count = iov_iter_count(i); 165d142ffacdef fs/gfs2/file.c Andreas Gruenbacher 2022-03-07 778 size_t size, offs; 00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 779 00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 780 if (likely(!count)) 00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 781 return false; 00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 782 if (ret <= 0 && ret != -EFAULT) 00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 783 return false; 00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 784 if (!iter_is_iovec(i)) 00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 785 return false; 00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 786 165d142ffacdef fs/gfs2/file.c Andreas Gruenbacher 2022-03-07 787 size = PAGE_SIZE; 165d142ffacdef fs/gfs2/file.c Andreas Gruenbacher 2022-03-07 788 offs = offset_in_page(i->iov[0].iov_base + i->iov_offset); 00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 789 if (*prev_count != count || !*window_size) { 165d142ffacdef fs/gfs2/file.c Andreas Gruenbacher 2022-03-07 790 int nr_dirtied; 00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 791 165d142ffacdef fs/gfs2/file.c Andreas Gruenbacher 2022-03-07 792 size = ALIGN(offs + count, PAGE_SIZE); 165d142ffacdef fs/gfs2/file.c Andreas Gruenbacher 2022-03-07 793 size = min_t(size_t, size, SZ_1M); 00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 794 nr_dirtied = max(current->nr_dirtied_pause - 165d142ffacdef fs/gfs2/file.c Andreas Gruenbacher 2022-03-07 795 current->nr_dirtied, 8); 165d142ffacdef fs/gfs2/file.c Andreas Gruenbacher 2022-03-07 @796 size = min(size, nr_dirtied << PAGE_SHIFT);
size is size_t so nr_dirtied needs to be size_t as well. I'm surprised this compiles. The min()/max() macros are supposed to trigger a compile error for type mismatches.
00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 797 } 00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 798 00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 799 *prev_count = count; 165d142ffacdef fs/gfs2/file.c Andreas Gruenbacher 2022-03-07 800 *window_size = size - offs; 00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 801 return true; 00bfe02f479688 fs/gfs2/file.c Andreas Gruenbacher 2021-10-18 802 }
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