tree: git://git.infradead.org/users/hch/block.git module_alloc-cleanup head: a9569e6c743ba6dfe6797854db101867564c4eab commit: cb99dabf06d82b66c104f82d371307bfcfab261a [1/5] x86: add a module_alloc_prot helper config: um-allmodconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-13) 9.3.0 reproduce (this is a W=1 build): git checkout cb99dabf06d82b66c104f82d371307bfcfab261a # save the attached .config to linux build tree make W=1 ARCH=um If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (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: arch/x86/um/../kernel/module.c:68:7: warning: no previous prototype for 'module_alloc_prot' [-Wmissing-prototypes] 68 | void *module_alloc_prot(unsigned long size, pgprot_t prot) | ^~~~~~~~~~~~~~~~~ arch/x86/um/../kernel/module.c: In function 'module_alloc_prot': 70 | unsigned int flags = (pgprot_val(prot) & _PAGE_NX) ? | ^~~~~~~~ arch/x86/um/../kernel/module.c:70:43: note: each undeclared identifier is reported only once for each function it appears in vim +/_PAGE_NX +70 arch/x86/um/../kernel/module.c 67 69 { 71 0 : VM_FLUSH_RESET_PERMS; 72 void *p; 73 74 if (PAGE_ALIGN(size) > MODULES_LEN) 75 return NULL; 76 77 p = __vmalloc_node_range(size, MODULE_ALIGN, 78 MODULES_VADDR + get_module_load_offset(), 79 MODULES_END, GFP_KERNEL, 80 prot, flags, NUMA_NO_NODE, 81 __builtin_return_address(0)); 82 if (p && (kasan_module_alloc(p, size) < 0)) { 83 vfree(p); 84 return NULL; 85 } 86 87 return p; 88 } 89 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org