tree: https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git treewide/gnu99 head: df0f3c59f076be0ab4a6d8de53fdeef871394594 commit: df0f3c59f076be0ab4a6d8de53fdeef871394594 [1/1] treewide: use -std=gnu99 config: m68k-defconfig (https://download.01.org/0day-ci/archive/20220113/202201130653.9pXG19yX-lk...) compiler: m68k-linux-gcc (GCC) 11.2.0 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 # https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git/commit/?id... git remote add mark https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git git fetch --no-tags mark treewide/gnu99 git checkout df0f3c59f076be0ab4a6d8de53fdeef871394594 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=m68k SHELL=/bin/bash drivers/block/drbd/ net/netfilter/ 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 include/linux/byteorder/big_endian.h:5, from arch/m68k/include/uapi/asm/byteorder.h:5, from include/asm-generic/bitops/le.h:7, from arch/m68k/include/asm/bitops.h:529, from include/linux/bitops.h:33, from include/linux/thread_info.h:27, from include/asm-generic/preempt.h:5, from ./arch/m68k/include/generated/asm/preempt.h:1, from include/linux/preempt.h:78, from arch/m68k/include/asm/irqflags.h:6, from include/linux/irqflags.h:16, from arch/m68k/include/asm/atomic.h:6, from include/linux/atomic.h:7, from include/linux/mm_types_task.h:13, from include/linux/mm_types.h:5, from include/linux/buildid.h:5, from include/linux/module.h:14, from net/netfilter/xt_hashlimit.c:13: net/netfilter/xt_hashlimit.c: In function 'maskl': 608 | return l ? htonl(ntohl(a) & ~0 << (32 - l)) : 0; | ^~ include/uapi/linux/byteorder/big_endian.h:40:51: note: in definition of macro '__cpu_to_be32' 40 | #define __cpu_to_be32(x) ((__force __be32)(__u32)(x)) | ^ include/linux/byteorder/generic.h:139:18: note: in expansion of macro '___htonl' 139 | #define htonl(x) ___htonl(x) | ^~~~~~~~ net/netfilter/xt_hashlimit.c:608:20: note: in expansion of macro 'htonl' 608 | return l ? htonl(ntohl(a) & ~0 << (32 - l)) : 0; | ^~~~~ -- drivers/block/drbd/drbd_main.c: In function 'dcbp_set_pad_bits': 1095 | p->encoding = (p->encoding & (~0x7 << 4)) | (n << 4); | ^~ vim +608 net/netfilter/xt_hashlimit.c 817e076f61bca3 Florian Westphal 2012-05-07 605 09e410def64324 Jan Engelhardt 2008-01-31 606 static inline __be32 maskl(__be32 a, unsigned int l) 09e410def64324 Jan Engelhardt 2008-01-31 607 { 1b9b70ea2ebaab Patrick McHardy 2008-04-09 @608 return l ? htonl(ntohl(a) & ~0 << (32 - l)) : 0; 09e410def64324 Jan Engelhardt 2008-01-31 609 } 09e410def64324 Jan Engelhardt 2008-01-31 610 :::::: The code at line 608 was first introduced by commit :::::: 1b9b70ea2ebaab26c3e4fed385dfab6fc16359ed [NETFILTER]: xt_hashlimit: fix mask calculation :::::: TO: Patrick McHardy <kaber(a)trash.net&gt; :::::: CC: David S. Miller <davem(a)davemloft.net&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org