[kbuild-all] [linux-next:master 7901/10701] drivers/net/wireless/mediatek/mt76/mt76x02.h:249:10: warning: result of comparison of constant 288 with expression of type 'u8' (aka 'unsigned char') is always false

tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: fb57b1fabcb28f358901b2df90abd2b48abc1ca8 commit: 49e649c3e0a6ec8a12976e331a2c1f29dc7dd3a9 [7901/10701] mt76: adjust wcid size to support new 802.11ax generation config: x86_64-allyesconfig (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project e6658079aca6d971b4e9d7137a3a2ecbc9c34aec) reproduce: 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 49e649c3e0a6ec8a12976e331a2c1f29dc7dd3a9 # 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: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): In file included from drivers/net/wireless/mediatek/mt76/mt76x02_util.c:8: if (idx >= ARRAY_SIZE(dev->wcid)) ~~~ ^ ~~~~~~~~~~~~~~~~~~~~~ 1 warning generated. -- In file included from drivers/net/wireless/mediatek/mt76/mt76x02_mac.c:7: if (idx >= ARRAY_SIZE(dev->wcid)) ~~~ ^ ~~~~~~~~~~~~~~~~~~~~~ if (stat->wcid < ARRAY_SIZE(dev->mt76.wcid)) ~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~ 2 warnings generated. -- In file included from drivers/net/wireless/mediatek/mt76/mt76x02_trace.c:10: In file included from drivers/net/wireless/mediatek/mt76/mt76x02_trace.h:10: if (idx >= ARRAY_SIZE(dev->wcid)) ~~~ ^ ~~~~~~~~~~~~~~~~~~~~~ In file included from drivers/net/wireless/mediatek/mt76/mt76x02_trace.c:10: In file included from drivers/net/wireless/mediatek/mt76/mt76x02_trace.h:87: include/trace/define_trace.h:95:10: fatal error: './mt76x02_trace.h' file not found #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/trace/define_trace.h:90:32: note: expanded from macro 'TRACE_INCLUDE' # define TRACE_INCLUDE(system) __TRACE_INCLUDE(system) ^~~~~~~~~~~~~~~~~~~~~~~ include/trace/define_trace.h:87:34: note: expanded from macro '__TRACE_INCLUDE' # define __TRACE_INCLUDE(system) __stringify(TRACE_INCLUDE_PATH/system.h) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/stringify.h:10:27: note: expanded from macro '__stringify' #define __stringify(x...) __stringify_1(x) ^~~~~~~~~~~~~~~~ include/linux/stringify.h:9:29: note: expanded from macro '__stringify_1' #define __stringify_1(x...) #x ^~ <scratch space>:15:1: note: expanded from here "./mt76x02_trace.h" ^~~~~~~~~~~~~~~~~~~ 1 warning and 1 error generated. -- In file included from drivers/net/wireless/mediatek/mt76/mt76x0/usb.c:10: In file included from drivers/net/wireless/mediatek/mt76/mt76x0/mt76x0.h:20: if (idx >= ARRAY_SIZE(dev->wcid)) ~~~ ^ ~~~~~~~~~~~~~~~~~~~~~ 1 warning generated. -- In file included from drivers/net/wireless/mediatek/mt76/mt76x2/eeprom.c:9: In file included from drivers/net/wireless/mediatek/mt76/mt76x2/mt76x2.h:23: if (idx >= ARRAY_SIZE(dev->wcid)) ~~~ ^ ~~~~~~~~~~~~~~~~~~~~~ 1 warning generated. -- if (idx >= ARRAY_SIZE(dev->mt76.wcid)) ~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/mediatek/mt76/mt7603/mac.c:1241:12: warning: result of comparison of constant 288 with expression of type 'u8' (aka 'unsigned char') is always false [-Wtautological-constant-out-of-range-compare] if (wcidx >= ARRAY_SIZE(dev->mt76.wcid)) ~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~ 2 warnings generated. -- if (idx >= ARRAY_SIZE(dev->mt76.wcid)) ~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/mediatek/mt76/mt7615/mac.c:1305:12: warning: result of comparison of constant 288 with expression of type 'u8' (aka 'unsigned char') is always false [-Wtautological-constant-out-of-range-compare] if (wcidx >= ARRAY_SIZE(dev->mt76.wcid)) ~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~ 2 warnings generated. vim +249 drivers/net/wireless/mediatek/mt76/mt76x02.h 713224164b5dfb drivers/net/wireless/mediatek/mt76/mt76x02_util.h Lorenzo Bianconi 2018-09-28 243 56e8d4dd5ce24c drivers/net/wireless/mediatek/mt76/mt76x02_util.h Lorenzo Bianconi 2018-10-04 244 static inline struct mt76x02_sta * 56e8d4dd5ce24c drivers/net/wireless/mediatek/mt76/mt76x02_util.h Lorenzo Bianconi 2018-10-04 245 mt76x02_rx_get_sta(struct mt76_dev *dev, u8 idx) 56e8d4dd5ce24c drivers/net/wireless/mediatek/mt76/mt76x02_util.h Lorenzo Bianconi 2018-10-04 246 { 56e8d4dd5ce24c drivers/net/wireless/mediatek/mt76/mt76x02_util.h Lorenzo Bianconi 2018-10-04 247 struct mt76_wcid *wcid; 56e8d4dd5ce24c drivers/net/wireless/mediatek/mt76/mt76x02_util.h Lorenzo Bianconi 2018-10-04 248 56e8d4dd5ce24c drivers/net/wireless/mediatek/mt76/mt76x02_util.h Lorenzo Bianconi 2018-10-04 @249 if (idx >= ARRAY_SIZE(dev->wcid)) 56e8d4dd5ce24c drivers/net/wireless/mediatek/mt76/mt76x02_util.h Lorenzo Bianconi 2018-10-04 250 return NULL; 56e8d4dd5ce24c drivers/net/wireless/mediatek/mt76/mt76x02_util.h Lorenzo Bianconi 2018-10-04 251 56e8d4dd5ce24c drivers/net/wireless/mediatek/mt76/mt76x02_util.h Lorenzo Bianconi 2018-10-04 252 wcid = rcu_dereference(dev->wcid[idx]); 56e8d4dd5ce24c drivers/net/wireless/mediatek/mt76/mt76x02_util.h Lorenzo Bianconi 2018-10-04 253 if (!wcid) 56e8d4dd5ce24c drivers/net/wireless/mediatek/mt76/mt76x02_util.h Lorenzo Bianconi 2018-10-04 254 return NULL; 56e8d4dd5ce24c drivers/net/wireless/mediatek/mt76/mt76x02_util.h Lorenzo Bianconi 2018-10-04 255 56e8d4dd5ce24c drivers/net/wireless/mediatek/mt76/mt76x02_util.h Lorenzo Bianconi 2018-10-04 256 return container_of(wcid, struct mt76x02_sta, wcid); 56e8d4dd5ce24c drivers/net/wireless/mediatek/mt76/mt76x02_util.h Lorenzo Bianconi 2018-10-04 257 } 56e8d4dd5ce24c drivers/net/wireless/mediatek/mt76/mt76x02_util.h Lorenzo Bianconi 2018-10-04 258 :::::: The code at line 249 was first introduced by commit :::::: 56e8d4dd5ce24cf534114c67de33861e86501981 mt76: move mt76x02_rx_get_sta and mt76x02_rx_get_sta_wcid in mt76x02_util.h :::::: TO: Lorenzo Bianconi <lorenzo.bianconi(a)redhat.com&gt; :::::: CC: Felix Fietkau <nbd(a)nbd.name&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org