tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-4.4 head: 210f388d2ecd2c6aa08e0c97d0abb9f50a98e143 commit: 71a989418474b1d1b25bc898b3880ac63d6e57e9 [37/52] UPSTREAM: ACPI: properties: Align return codes of __acpi_node_get_property_reference() config: x86_64-randconfig-a003-20200820 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project b587ca93be114d07ec3bf654add97d7872325281) 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 71a989418474b1d1b25bc898b3880ac63d6e57e9 # 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 >>): ((val) == 1 || (val) == -1)) ? \ ~~~ ^ ~~ In file included from drivers/media/pci/ngene/ngene-core.c:36: In file included from include/linux/pci.h:32: In file included from include/linux/resource_ext.h:19: In file included from include/linux/slab.h:113: In file included from include/linux/kasan.h:4: In file included from include/linux/sched.h:62: In file included from include/linux/cgroup-defs.h:16: include/linux/percpu-refcount.h:276:3: warning: comparison of integers of different signs: 'unsigned long' and 'int' [-Wsign-compare] this_cpu_sub(*percpu_count, nr); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:536:33: note: expanded from macro 'this_cpu_sub' #define this_cpu_sub(pcp, val) this_cpu_add(pcp, -(typeof(pcp))(val)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:526:33: note: expanded from macro 'this_cpu_add' #define this_cpu_add(pcp, val) __pcpu_size_call(this_cpu_add_, pcp, val) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:397:11: note: expanded from macro '__pcpu_size_call' case 8: stem##8(variable, __VA_ARGS__);break; \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <scratch space>:154:1: note: expanded from here this_cpu_add_8 ^ arch/x86/include/asm/percpu.h:478:35: note: expanded from macro 'this_cpu_add_8' #define this_cpu_add_8(pcp, val) percpu_add_op((pcp), val) ^~~~~~~~~~~~~~~~~~~~~~~~~ arch/x86/include/asm/percpu.h:130:31: note: expanded from macro 'percpu_add_op' ((val) == 1 || (val) == -1)) ? \ ~~~ ^ ~~ In file included from drivers/media/pci/ngene/ngene-core.c:42: In file included from drivers/media/pci/ngene/ngene.h:42: In file included from drivers/media/dvb-core/dvb_net.h:26: In file included from include/linux/netdevice.h:42: In file included from include/linux/ethtool.h:16: In file included from include/uapi/linux/ethtool.h:17: In file included from include/linux/if_ether.h:23: include/linux/skbuff.h:2675:23: warning: comparison of integers of different signs: 'size_t' (aka 'unsigned long') and 'int' [-Wsign-compare] &csum, from) == copy) { ~~~~~~~~~~~~ ^ ~~~~ include/linux/skbuff.h:2679:60: warning: comparison of integers of different signs: 'size_t' (aka 'unsigned long') and 'int' [-Wsign-compare] } else if (copy_from_iter(skb_put(skb, copy), copy, from) == copy) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~ include/linux/skbuff.h:2693:14: warning: comparison of integers of different signs: 'int' and 'unsigned int' [-Wsign-compare] off == frag->page_offset + skb_frag_size(frag); ~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/skbuff.h:2921:51: warning: comparison of integers of different signs: 'size_t' (aka 'unsigned long') and 'int' [-Wsign-compare] return copy_from_iter(data, len, &msg->msg_iter) == len ? 0 : -EFAULT; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~ include/linux/skbuff.h:2926:49: warning: comparison of integers of different signs: 'size_t' (aka 'unsigned long') and 'int' [-Wsign-compare] return copy_to_iter(data, len, &msg->msg_iter) == len ? 0 : -EFAULT; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~ In file included from drivers/media/pci/ngene/ngene-core.c:42: In file included from drivers/media/pci/ngene/ngene.h:42: In file included from drivers/media/dvb-core/dvb_net.h:26: In file included from include/linux/netdevice.h:43: In file included from include/net/net_namespace.h:17: In file included from include/net/netns/ipv4.h:9: In file included from include/net/inet_frag.h:4: include/linux/rhashtable.h:264:34: warning: comparison of integers of different signs: 'int' and 'unsigned int' [-Wsign-compare] return atomic_read(&ht->nelems) > (tbl->size / 4 * 3) && ~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~ include/linux/rhashtable.h:277:34: warning: comparison of integers of different signs: 'int' and 'unsigned int' [-Wsign-compare] return atomic_read(&ht->nelems) < (tbl->size * 3 / 10) && ~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~ include/linux/rhashtable.h:289:34: warning: comparison of integers of different signs: 'int' and 'const unsigned int' [-Wsign-compare] return atomic_read(&ht->nelems) > tbl->size && ~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~ include/linux/rhashtable.h:302:34: warning: comparison of integers of different signs: 'int' and 'const unsigned int' [-Wsign-compare] atomic_read(&ht->nelems) >= ht->p.insecure_max_entries; ~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from drivers/media/pci/ngene/ngene-core.c:42: In file included from drivers/media/pci/ngene/ngene.h:42: In file included from drivers/media/dvb-core/dvb_net.h:26: include/linux/netdevice.h:2413:34: warning: comparison of integers of different signs: 'int' and 'unsigned int' [-Wsign-compare] skb_checksum_start_offset(skb) < ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ include/linux/netdevice.h:3051:15: warning: comparison of integers of different signs: 'int' and 'unsigned int' [-Wsign-compare] BUG_ON(index >= dev->num_rx_queues); ~~~~~ ^ ~~~~~~~~~~~~~~~~~~ include/asm-generic/bug.h:58:45: note: expanded from macro 'BUG_ON' #define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while (0) ^~~~~~~~~ include/linux/compiler.h:182:42: note: expanded from macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^ In file included from drivers/media/pci/ngene/ngene-core.c:42: In file included from drivers/media/pci/ngene/ngene.h:42: In file included from drivers/media/dvb-core/dvb_net.h:26: include/linux/netdevice.h:3325:37: warning: comparison of integers of different signs: 'int' and 'unsigned long' [-Wsign-compare] if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) ~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~ drivers/media/pci/ngene/ngene-core.c:816:16: warning: comparison of integers of different signs: 'int' and 'u32' (aka 'unsigned int') [-Wsign-compare] for (j = 0; j < tb->NumBuffers; j++, Cur = Cur->Next) { ~ ^ ~~~~~~~~~~~~~~ drivers/media/pci/ngene/ngene-core.c:1026:16: warning: comparison of integers of different signs: 'int' and 'u32' (aka 'unsigned int') [-Wsign-compare] for (i = 0; i < n; i++) { ~ ^ ~ 19 warnings generated. /tmp/ngene-core-232503.s: Assembler messages: /tmp/ngene-core-232503.s:14126: 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