tree: git://git.infradead.org/users/hch/misc.git module_alloc-cleanup head: d435793fc6f10b6d93bb759ed53efe0d41a64901 commit: 1b362649d96428e3619296041b77c966f3f12628 [1/5] x86: add a module_alloc_prot helper config: um-x86_64_defconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-13) 9.3.0 reproduce (this is a W=1 build): git checkout 1b362649d96428e3619296041b77c966f3f12628 # save the attached .config to linux build tree make W=1 ARCH=um SUBARCH=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 >>, old ones prefixed by <<): cc1: warning: arch/um/include/uapi: No such file or directory [-Wmissing-include-dirs] In file included from include/linux/uaccess.h:11, 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:33, from arch/x86/um/../kernel/module.c:12: 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] 17 | (((unsigned long) (addr) >= FIXADDR_USER_START) && | ^~ arch/um/include/asm/uaccess.h:45:3: note: in expansion of macro '__access_ok_vsyscall' 45 | __access_ok_vsyscall(addr, size) || | ^~~~~~~~~~~~~~~~~~~~ In file included from include/linux/kernel.h:11, from include/linux/list.h:9, from include/linux/module.h:12, from include/linux/moduleloader.h:6, from arch/x86/um/../kernel/module.c:9: 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] 32 | BUILD_BUG_ON(idx >= __end_of_fixed_addresses); | ^~ include/linux/compiler.h:372:9: note: in definition of macro '__compiletime_assert' 372 | if (!(condition)) | ^~~~~~~~~ include/linux/compiler.h:392:2: note: in expansion of macro '_compiletime_assert' 392 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert' 39 | #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' 50 | 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' 32 | BUILD_BUG_ON(idx >= __end_of_fixed_addresses); | ^~~~~~~~~~~~ arch/x86/um/../kernel/module.c: At top level: 68 | void *module_alloc_prot(unsigned long size, pgprot_t prot) | ^~~~~~~~~~~~~~~~~ vim +/module_alloc_prot +68 arch/x86/um/../kernel/module.c 67 69 { 70 void *p; 71 72 if (PAGE_ALIGN(size) > MODULES_LEN) 73 return NULL; 74 75 p = __vmalloc_node_range(size, MODULE_ALIGN, 76 MODULES_VADDR + get_module_load_offset(), 77 MODULES_END, GFP_KERNEL, 78 prot, 0, NUMA_NO_NODE, 79 __builtin_return_address(0)); 80 if (p && (kasan_module_alloc(p, size) < 0)) { 81 vfree(p); 82 return NULL; 83 } 84 85 return p; 86 } 87 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org