tree: https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git untested.iov_iter-2 head: 5fe048dcff7837bcf95ef3c4f73fb230153a388b commit: d2e019de6652bdd76006fab8b125f543c431e724 [2/30] teach copy_page_to_iter() to handle compound pages config: mips-randconfig-r006-20210503 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 8f5a2a5836cc8e4c1def2bdeb022e7b496623439) 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 mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git/commit/?id=d2e019de6652bdd76006fab8b125f543c431e724 git remote add vfs https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git git fetch --no-tags vfs untested.iov_iter-2 git checkout d2e019de6652bdd76006fab8b125f543c431e724 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> lib/iov_iter.c:925:5: warning: comparison of distinct pointer types ('typeof (bytes) (aka 'unsigned int and 'typeof (((1UL) << 14) - offset) (aka 'unsigned long min(bytes, PAGE_SIZE - offset), i); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/minmax.h:51:19: note: expanded from macro 'min' #define min(x, y) __careful_cmp(x, y, <) ^~~~~~~~~~~~~~~~~~~~~~ include/linux/minmax.h:42:24: note: expanded from macro '__careful_cmp' __builtin_choose_expr(__safe_cmp(x, y), ^~~~~~~~~~~~~~~~ include/linux/minmax.h:32:4: note: expanded from macro '__safe_cmp' (__typecheck(x, y) && __no_side_effects(x, y)) ^~~~~~~~~~~~~~~~~ include/linux/minmax.h:18:28: note: expanded from macro '__typecheck' == (typeof(y) ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~ fatal error: error in backend: Nested variants found in inline asm string: ' .set push .set mips64r2 .if ( 0x00 ) != -1)) 0x00 ) != -1)) : ($( static struct ftrace_branch_data __attribute__((__aligned__(4))) __attribute__((__section__("_ftrace_branch"))) __if_trace = $( .func = __func__, .file = "arch/mips/include/asm/atomic.h", .line = 153, $); 0x00 ) != -1)) : $))) ) && ( 0 ); .set push; .set mips64r2; .rept 1; sync 0x00; .endr; .set pop; .else; ; .endif 1: ll $0, $1 # atomic_add addu $0, $2 sc $0, $1 beqz $0, 1b .set pop ' clang-13: error: clang frontend command failed with exit code 70 (use -v to see invocation) clang version 13.0.0 (git://gitmirror/llvm_project 8f5a2a5836cc8e4c1def2bdeb022e7b496623439) Target: mipsel-unknown-linux-gnu Thread model: posix InstalledDir: /opt/cross/clang-8f5a2a5836/bin clang-13: note: diagnostic msg: Makefile arch block certs crypto drivers fs include init ipc kernel lib mm scripts security sound source usr virt vim +925 lib/iov_iter.c 914 915 size_t copy_page_to_iter(struct page *page, size_t offset, size_t bytes, 916 struct iov_iter *i) 917 { 918 size_t res = 0; 919 if (unlikely(!page_copy_sane(page, offset, bytes))) 920 return 0; 921 page += offset / PAGE_SIZE; // first subpage 922 offset %= PAGE_SIZE; 923 while (1) { 924 size_t n = __copy_page_to_iter(page, offset, > 925 min(bytes, PAGE_SIZE - offset), i); 926 res += n; 927 bytes -= n; 928 if (!bytes || !n) 929 break; 930 offset += n; 931 if (offset == PAGE_SIZE) { 932 page++; 933 offset = 0; 934 } 935 } 936 return res; 937 } 938 EXPORT_SYMBOL(copy_page_to_iter); 939 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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