tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git queue-4.4 head: 468d91b8a8759ba935302dc08716f4d3242a73a7 commit: 414ad9babd329c871dcf804bb9b828bd4b59f28e [7/10] xfs: initialize the shortform attr header padding entry config: x86_64-randconfig-a002-20200913 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project b2c32c90bab09a6e2c1f370429db26017a182143) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu git checkout 414ad9babd329c871dcf804bb9b828bd4b59f28e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 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/dlm/lowcomms.c:48: In file included from include/net/sock.h:62: In file included from include/linux/filter.h:16: In file included from include/net/sch_generic.h:12: In file included from include/net/rtnetlink.h:5: include/net/netlink.h:337:18: warning: comparison of integers of different signs: 'const __u32' (aka 'const unsigned int') and 'int' [-Wsign-compare] nlh->nlmsg_len <= remaining); ~~~~~~~~~~~~~~ ^ ~~~~~~~~~ include/net/netlink.h:372:21: warning: comparison of integers of different signs: 'const __u32' (aka 'const unsigned int') and 'int' [-Wsign-compare] if (nlh->nlmsg_len < nlmsg_msg_size(hdrlen)) ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~ include/net/netlink.h:405:21: warning: comparison of integers of different signs: 'const __u32' (aka 'const unsigned int') and 'int' [-Wsign-compare] if (nlh->nlmsg_len < nlmsg_msg_size(hdrlen)) ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~ In file included from fs/dlm/lowcomms.c:48: In file included from include/net/sock.h:62: In file included from include/linux/filter.h:16: In file included from include/net/sch_generic.h:12: include/net/rtnetlink.h:20:21: warning: comparison of integers of different signs: 'int' and 'unsigned long' [-Wsign-compare] if (nlmsg_len(nlh) >= sizeof(struct rtgenmsg)) ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~ In file included from fs/dlm/lowcomms.c:48: In file included from include/net/sock.h:62: In file included from include/linux/filter.h:16: include/net/sch_generic.h:267:33: warning: comparison of integers of different signs: 'unsigned long' and 'int' [-Wsign-compare] BUILD_BUG_ON(sizeof(qcb->data) < sz); ~~~~~~~~~~~~~~~~~ ^ ~~ include/linux/bug.h:74:19: note: expanded from macro 'BUILD_BUG_ON' BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition) ^~~~~~~~~ include/linux/bug.h:50:58: note: expanded from macro 'BUILD_BUG_ON_MSG' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^~~~ include/linux/compiler.h:505:22: note: expanded from macro 'compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ^~~~~~~~~ include/linux/compiler.h:493:23: note: expanded from macro '_compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ^~~~~~~~~ include/linux/compiler.h:485:19: note: expanded from macro '__compiletime_assert' bool __cond = !(condition); \ ^~~~~~~~~ In file included from fs/dlm/lowcomms.c:48: In file included from include/net/sock.h:62: include/linux/filter.h:517:16: warning: comparison of integers of different signs: 'const __u32' (aka 'const unsigned int') and 'int' [-Wsign-compare] if (first->k == SKF_AD_OFF + SKF_AD_ALU_XOR_X) ~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from fs/dlm/lowcomms.c:48: include/net/sock.h:1838:54: warning: comparison of integers of different signs: 'size_t' (aka 'unsigned long') and 'int' [-Wsign-compare] if (csum_and_copy_from_iter(to, copy, &csum, from) != copy) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~ include/net/sock.h:1842:46: warning: comparison of integers of different signs: 'size_t' (aka 'unsigned long') and 'int' [-Wsign-compare] if (copy_from_iter_nocache(to, copy, from) != copy) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~ include/net/sock.h:1844:44: warning: comparison of integers of different signs: 'size_t' (aka 'unsigned long') and 'int' [-Wsign-compare] } else if (copy_from_iter(to, copy, from) != copy) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~ In file included from fs/dlm/lowcomms.c:49: In file included from include/net/tcp.h:24: In file included from include/linux/tcp.h:23: include/net/inet_connection_sock.h:294:38: warning: comparison of integers of different signs: 'int' and 'const u32' (aka 'const unsigned int') [-Wsign-compare] return inet_csk_reqsk_queue_len(sk) >= sk->sk_max_ack_backlog; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~ In file included from fs/dlm/lowcomms.c:49: include/net/tcp.h:321:25: warning: comparison of integers of different signs: 'int' and 'unsigned long' [-Wsign-compare] if (sk->sk_wmem_queued > SOCK_MIN_SNDBUF && ~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~ include/net/tcp.h:1201:12: warning: comparison of integers of different signs: 's32' (aka 'int') and '__u32' (aka 'unsigned int') [-Wsign-compare] if (delta > inet_csk(sk)->icsk_rto) ~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~ include/net/tcp.h:1276:29: warning: comparison of integers of different signs: 'unsigned long' and 'long' [-Wsign-compare] if (unlikely(get_seconds() >= rx_opt->ts_recent_stamp + TCP_PAWS_24DAYS)) ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:182:42: note: expanded from macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^ In file included from fs/dlm/lowcomms.c:49: include/net/tcp.h:1306:27: warning: comparison of integers of different signs: 'unsigned long' and 'long' [-Wsign-compare] if (rst && get_seconds() >= rx_opt->ts_recent_stamp + TCP_PAWS_MSL) ~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from fs/dlm/lowcomms.c:55: In file included from include/net/sctp/sctp.h:76: In file included from include/net/sctp/structs.h:88: include/net/sctp/ulpevent.h:147:13: warning: comparison of integers of different signs: 'int' and 'unsigned long' [-Wsign-compare] if (offset >= sizeof(struct sctp_event_subscribe)) ~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ fs/dlm/lowcomms.c:185:19: warning: comparison of integers of different signs: 'uint32_t' (aka 'unsigned int') and 'int' [-Wsign-compare] if (con->nodeid == nodeid) ~~~~~~~~~~~ ^ ~~~~~~ fs/dlm/lowcomms.c:614:26: warning: comparison of integers of different signs: 'int' and 'unsigned int' [-Wsign-compare] if (cbuf_data(&con->cb) >= con->cb.base) { ~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~ fs/dlm/lowcomms.c:626:15: warning: comparison of integers of different signs: 'int' and 'unsigned int' [-Wsign-compare] else if (ret == len) ~~~ ^ ~~~ fs/dlm/lowcomms.c:1369:32: warning: comparison of integers of different signs: 'unsigned long' and 'int' [-Wsign-compare] (PAGE_CACHE_SIZE - e->end < len)) { ~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~ 35 warnings generated. /tmp/lowcomms-373448.s: Assembler messages: /tmp/lowcomms-373448.s:453: Warning: no instruction mnemonic suffix given and no register operands; using default for `bts' /tmp/lowcomms-373448.s:1273: Warning: no instruction mnemonic suffix given and no register operands; using default for `btr' /tmp/lowcomms-373448.s:1288: Warning: no instruction mnemonic suffix given and no register operands; using default for `btr' /tmp/lowcomms-373448.s:1429: Warning: no instruction mnemonic suffix given and no register operands; using default for `bts' /tmp/lowcomms-373448.s:1454: Warning: no instruction mnemonic suffix given and no register operands; using default for `bts' /tmp/lowcomms-373448.s:1473: Warning: no instruction mnemonic suffix given and no register operands; using default for `bts' /tmp/lowcomms-373448.s:1778: Warning: no instruction mnemonic suffix given and no register operands; using default for `bts' /tmp/lowcomms-373448.s:2039: Warning: no instruction mnemonic suffix given and no register operands; using default for `bts' /tmp/lowcomms-373448.s:2282: Warning: no instruction mnemonic suffix given and no register operands; using default for `bts' /tmp/lowcomms-373448.s:2421: Warning: no instruction mnemonic suffix given and no register operands; using default for `bts' /tmp/lowcomms-373448.s:2452: Warning: no instruction mnemonic suffix given and no register operands; using default for `btr' /tmp/lowcomms-373448.s:2458: Warning: no instruction mnemonic suffix given and no register operands; using default for `bts' /tmp/lowcomms-373448.s:2481: Warning: no instruction mnemonic suffix given and no register operands; using default for `bts' /tmp/lowcomms-373448.s:2845: Warning: no instruction mnemonic suffix given and no register operands; using default for `bts' /tmp/lowcomms-373448.s:3061: Warning: no instruction mnemonic suffix given and no register operands; using default for `bts' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org