tree: https://android.googlesource.com/kernel/common android-4.19 head: 7bab03039e64ed6c26be90530e08978eab3be578 commit: 040942fc50b20325bb56737c32b303268bb6f35c [1/4] ANDROID: Initial commit of Incremental FS config: arm-randconfig-r001-20210430 (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 arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi git remote add android-common https://android.googlesource.com/kernel/common git fetch --no-tags android-common android-4.19 git checkout 040942fc50b20325bb56737c32b303268bb6f35c # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from fs/incfs/format.c:5: In file included from include/linux/fs.h:6: In file included from include/linux/wait_bit.h:8: In file included from include/linux/wait.h:7: In file included from include/linux/list.h:9: In file included from include/linux/kernel.h:11: In file included from include/linux/bitops.h:19: In file included from arch/arm/include/asm/bitops.h:268: In file included from include/asm-generic/bitops/le.h:6: In file included from arch/arm/include/uapi/asm/byteorder.h:22: In file included from include/linux/byteorder/little_endian.h:11: include/linux/byteorder/generic.h:195:16: warning: comparison of integers of different signs: 'int' and 'size_t' (aka 'unsigned int') [-Wsign-compare] for (i = 0; i < len; i++) ~ ^ ~~~ include/linux/byteorder/generic.h:203:16: warning: comparison of integers of different signs: 'int' and 'size_t' (aka 'unsigned int') [-Wsign-compare] for (i = 0; i < len; i++) ~ ^ ~~~ In file included from fs/incfs/format.c:5: In file included from include/linux/fs.h:6: In file included from include/linux/wait_bit.h:8: In file included from include/linux/wait.h:9: In file included from include/linux/spinlock.h:51: In file included from include/linux/preempt.h:81: In file included from ./arch/arm/include/generated/asm/preempt.h:1: In file included from include/asm-generic/preempt.h:5: include/linux/thread_info.h:141:29: warning: comparison of integers of different signs: 'int' and 'size_t' (aka 'unsigned int') [-Wsign-compare] if (unlikely(sz >= 0 && sz < bytes)) { ~~ ^ ~~~~~ include/linux/compiler.h:77:42: note: expanded from macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^ In file included from fs/incfs/format.c:5: In file included from include/linux/fs.h:8: In file included from include/linux/dcache.h:7: In file included from include/linux/rculist.h:11: In file included from include/linux/rcupdate.h:44: In file included from include/linux/cpumask.h:12: include/linux/bitmap.h:359:36: warning: comparison of integers of different signs: 'int' and 'unsigned int' [-Wsign-compare] return find_first_bit(src, nbits) == nbits; ~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~ include/linux/bitmap.h:367:41: warning: comparison of integers of different signs: 'int' and 'unsigned int' [-Wsign-compare] return find_first_zero_bit(src, nbits) == nbits; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~ In file included from fs/incfs/format.c:5: In file included from include/linux/fs.h:237: In file included from include/linux/quota.h:40: In file included from include/linux/percpu_counter.h:16: In file included from include/linux/gfp.h:6: include/linux/mmzone.h:987:44: warning: comparison of integers of different signs: 'int' and 'enum zone_type' [-Wsign-compare] if (likely(!nodes && zonelist_zone_idx(z) <= highest_zoneidx)) ~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~ include/linux/compiler.h:76:40: note: expanded from macro 'likely' # define likely(x) __builtin_expect(!!(x), 1) ^ In file included from fs/incfs/format.c:9: In file included from include/linux/mm.h:26: In file included from include/linux/page_ref.h:7: include/linux/page-flags.h:163:21: warning: comparison of integers of different signs: 'const unsigned long' and 'long' [-Wsign-compare] return page->flags == PAGE_POISON_PATTERN; ~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~ In file included from fs/incfs/format.c:15: fs/incfs/compat.h:11:22: warning: redefinition of typedef '__poll_t' is a C11 feature [-Wtypedef-redefinition] typedef unsigned int __poll_t; ^ include/uapi/linux/types.h:52:28: note: previous definition is here typedef unsigned __bitwise __poll_t; ^ fs/incfs/format.c:130:10: warning: comparison of integers of different signs: 'ssize_t' (aka 'int') and 'size_t' (aka 'unsigned int') [-Wsign-compare] if (res != count) ~~~ ^ ~~~~~ fs/incfs/format.c:534:13: warning: comparison of integers of different signs: 'int' and 'const size_t' (aka 'const unsigned int') [-Wsign-compare] if (result < bytes_to_read) ~~~~~~ ^ ~~~~~~~~~~~~~ fs/incfs/format.c:555:17: warning: comparison of integers of different signs: 'ssize_t' (aka 'int') and 'unsigned int' [-Wsign-compare] if (bytes_read < sizeof(fh)) ~~~~~~~~~~ ^ ~~~~~~~~~~ md_record_size); ^~~~~~~~~~~~~~ include/linux/printk.h:311:17: note: expanded from macro 'pr_warn' #define pr_warn pr_warning ^ include/linux/printk.h:310:37: note: expanded from macro 'pr_warning' printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) ~~~ ^~~~~~~~~~~ fs/incfs/format.c:607:17: warning: comparison of integers of different signs: 'ssize_t' (aka 'int') and 'unsigned int' [-Wsign-compare] if (bytes_read < sizeof(*md_hdr)) ~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~ fs/incfs/format.c:621:17: warning: comparison of integers of different signs: 'ssize_t' (aka 'int') and 'size_t' (aka 'unsigned int') [-Wsign-compare] if (bytes_read < md_record_size) { ~~~~~~~~~~ ^ ~~~~~~~~~~~~~~ 14 warnings generated. /usr/bin/as: unrecognized option '-EL' clang-13: error: assembler command failed with exit code 1 (use -v to see invocation) Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for WIRELESS_EXT Depends on NET && WIRELESS Selected by - GKI_LEGACY_WEXT_ALLCONFIG WARNING: unmet direct dependencies detected for WEXT_CORE Depends on NET && WIRELESS && (CFG80211_WEXT || WIRELESS_EXT Selected by - GKI_LEGACY_WEXT_ALLCONFIG WARNING: unmet direct dependencies detected for WEXT_PROC Depends on NET && WIRELESS && PROC_FS && WEXT_CORE Selected by - GKI_LEGACY_WEXT_ALLCONFIG WARNING: unmet direct dependencies detected for WEXT_PRIV Depends on NET && WIRELESS Selected by - GKI_LEGACY_WEXT_ALLCONFIG WARNING: unmet direct dependencies detected for WEXT_SPY Depends on NET && WIRELESS Selected by - GKI_LEGACY_WEXT_ALLCONFIG vim +617 fs/incfs/format.c 578 579 /* 580 * Read through metadata records from the backing file one by one 581 * and call provided metadata handlers. 582 */ 583 int incfs_read_next_metadata_record(struct backing_file_context *bfc, 584 struct metadata_handler *handler) 585 { 586 const ssize_t max_md_size = INCFS_MAX_METADATA_RECORD_SIZE; 587 ssize_t bytes_read = 0; 588 size_t md_record_size = 0; 589 loff_t next_record = 0; 590 loff_t prev_record = 0; 591 int res = 0; 592 struct incfs_md_header *md_hdr = NULL; 593 594 if (!bfc || !handler) 595 return -EFAULT; 596 597 LOCK_REQUIRED(bfc->bc_mutex); 598 599 if (handler->md_record_offset == 0) 600 return -EPERM; 601 602 memset(&handler->md_buffer, 0, max_md_size); 603 bytes_read = incfs_kread(bfc->bc_file, &handler->md_buffer, 604 max_md_size, handler->md_record_offset); 605 if (bytes_read < 0) 606 return bytes_read; 607 if (bytes_read < sizeof(*md_hdr)) 608 return -EBADMSG; 609 610 md_hdr = &handler->md_buffer.md_header; 611 next_record = le64_to_cpu(md_hdr->h_next_md_offset); 612 prev_record = le64_to_cpu(md_hdr->h_prev_md_offset); 613 md_record_size = le16_to_cpu(md_hdr->h_record_size); 614 615 if (md_record_size > max_md_size) { 616 pr_warn("incfs: The record is too large. Size: %ld", 618 return -EBADMSG; 619 } 620 621 if (bytes_read < md_record_size) { 622 pr_warn("incfs: The record hasn't been fully read."); 623 return -EBADMSG; 624 } 625 626 if (next_record <= handler->md_record_offset && next_record != 0) { 627 pr_warn("incfs: Next record (%lld) points back in file.", 628 next_record); 629 return -EBADMSG; 630 } 631 632 if (prev_record != handler->md_prev_record_offset) { 633 pr_warn("incfs: Metadata chain has been corrupted."); 634 return -EBADMSG; 635 } 636 637 if (le32_to_cpu(md_hdr->h_record_crc) != calc_md_crc(md_hdr)) { 638 pr_warn("incfs: Metadata CRC mismatch."); 639 return -EBADMSG; 640 } 641 642 switch (md_hdr->h_md_entry_type) { 643 case INCFS_MD_NONE: 644 break; 645 case INCFS_MD_BLOCK_MAP: 646 if (handler->handle_blockmap) 647 res = handler->handle_blockmap( 648 &handler->md_buffer.blockmap, handler); 649 break; 650 case INCFS_MD_FILE_ATTR: 651 if (handler->handle_file_attr) 652 res = handler->handle_file_attr( 653 &handler->md_buffer.file_attr, handler); 654 break; 655 case INCFS_MD_SIGNATURE: 656 if (handler->handle_signature) 657 res = handler->handle_signature( 658 &handler->md_buffer.signature, handler); 659 break; 660 default: 661 res = -ENOTSUPP; 662 break; 663 } 664 665 if (!res) { 666 if (next_record == 0) { 667 /* 668 * Zero offset for the next record means that the last 669 * metadata record has just been processed. 670 */ 671 bfc->bc_last_md_record_offset = 672 handler->md_record_offset; 673 } 674 handler->md_prev_record_offset = handler->md_record_offset; 675 handler->md_record_offset = next_record; 676 } 677 return res; 678 } 679 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org