tree: git://git.infradead.org/users/hch/misc.git kernel_setsockopt head: 43d0f0870df329db68ecbae8e699615ff0c009f1 commit: f7fa6070e761f3e00b46dac42bd9d550367e26a7 [6/32] net: add sock_set_sndtimeo config: um-defconfig (attached as .config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce: git checkout f7fa6070e761f3e00b46dac42bd9d550367e26a7 # save the attached .config to linux build tree make ARCH=um If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): cc1: warning: arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] In file included from include/linux/kernel.h:11:0, from include/linux/unaligned/access_ok.h:5, from arch/x86/include/asm/unaligned.h:9, from net/core/sock.c:88: include/asm-generic/fixmap.h: In function 'fix_to_virt': include/asm-generic/fixmap.h:32:19: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits] BUILD_BUG_ON(idx >= __end_of_fixed_addresses); ^ include/linux/compiler.h:330:9: note: in definition of macro '__compiletime_assert' if (!(condition)) ^~~~~~~~~ include/linux/compiler.h:350:2: note: in expansion of macro '_compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ^~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:50:2: note: in expansion of macro 'BUILD_BUG_ON_MSG' BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition) ^~~~~~~~~~~~~~~~ include/asm-generic/fixmap.h:32:2: note: in expansion of macro 'BUILD_BUG_ON' BUILD_BUG_ON(idx >= __end_of_fixed_addresses); ^~~~~~~~~~~~ In file included from include/linux/uaccess.h:11:0, from include/linux/sched/task.h:11, from include/linux/sched/signal.h:9, from include/linux/rcuwait.h:6, from include/linux/percpu-rwsem.h:7, from include/linux/fs.h:34, from include/linux/huge_mm.h:8, from include/linux/mm.h:679, from include/linux/bvec.h:13, from include/linux/skbuff.h:17, from include/linux/ip.h:16, from include/net/ip.h:22, from include/linux/errqueue.h:6, from net/core/sock.c:91: arch/um/include/asm/uaccess.h: In function '__access_ok': arch/um/include/asm/uaccess.h:17:29: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits] (((unsigned long) (addr) >= FIXADDR_USER_START) && ^ arch/um/include/asm/uaccess.h:45:3: note: in expansion of macro '__access_ok_vsyscall' __access_ok_vsyscall(addr, size) || ^~~~~~~~~~~~~~~~~~~~ net/core/sock.c: In function 'sock_set_sndtimeo': if (secs && secs < MAX_SCHEDULE_TIMEOUT / HZ - 1) ^ vim +758 net/core/sock.c 754 755 void sock_set_sndtimeo(struct sock *sk, unsigned int secs) 756 { 757 lock_sock(sk); 759 sk->sk_sndtimeo = secs * HZ; 760 else 761 sk->sk_sndtimeo = MAX_SCHEDULE_TIMEOUT; 762 release_sock(sk); 763 } 764 EXPORT_SYMBOL(sock_set_sndtimeo); 765 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org