Hi Ryder, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 625d3449788f85569096780592549d0340e9c0c7 commit: 49e649c3e0a6ec8a12976e331a2c1f29dc7dd3a9 mt76: adjust wcid size to support new 802.11ax generation date: 6 weeks ago config: x86_64-randconfig-a003-20200622 (attached as .config) compiler: gcc-9 (Debian 9.3.0-13) 9.3.0 reproduce (this is a W=1 build): git checkout 49e649c3e0a6ec8a12976e331a2c1f29dc7dd3a9 # save the attached .config to linux build tree make W=1 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 >>, old ones prefixed by <<): In file included from include/linux/export.h:43, from include/linux/linkage.h:7, from include/linux/kernel.h:8, from include/linux/list.h:9, from include/linux/module.h:12, from drivers/net/wireless/mediatek/mt76/mt76x02_util.c:7: drivers/net/wireless/mediatek/mt76/mt76x02.h: In function 'mt76x02_rx_get_sta': drivers/net/wireless/mediatek/mt76/mt76x02.h:249:10: warning: comparison is always false due to limited range of data type [-Wtype-limits] 249 | if (idx >= ARRAY_SIZE(dev->wcid)) | ^~ include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var' 58 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) | ^~~~ 249 | if (idx >= ARRAY_SIZE(dev->wcid)) | ^~ drivers/net/wireless/mediatek/mt76/mt76x02.h:249:10: warning: comparison is always false due to limited range of data type [-Wtype-limits] 249 | if (idx >= ARRAY_SIZE(dev->wcid)) | ^~ include/linux/compiler.h:58:61: note: in definition of macro '__trace_if_var' 58 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) | ^~~~ 249 | if (idx >= ARRAY_SIZE(dev->wcid)) | ^~ drivers/net/wireless/mediatek/mt76/mt76x02.h:249:10: warning: comparison is always false due to limited range of data type [-Wtype-limits] 249 | if (idx >= ARRAY_SIZE(dev->wcid)) | ^~ include/linux/compiler.h:69:3: note: in definition of macro '__trace_if_value' 69 | (cond) ? | ^~~~ include/linux/compiler.h:56:28: note: in expansion of macro '__trace_if_var' 56 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) | ^~~~~~~~~~~~~~ 249 | if (idx >= ARRAY_SIZE(dev->wcid)) | ^~ -- In file included from include/linux/export.h:43, from include/linux/linkage.h:7, from include/linux/kernel.h:8, from drivers/net/wireless/mediatek/mt76/mt76x0/pci.c:6: drivers/net/wireless/mediatek/mt76/mt76x0/../mt76x02.h: In function 'mt76x02_rx_get_sta': drivers/net/wireless/mediatek/mt76/mt76x0/../mt76x02.h:249:10: warning: comparison is always false due to limited range of data type [-Wtype-limits] 249 | if (idx >= ARRAY_SIZE(dev->wcid)) | ^~ include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var' 58 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) | ^~~~ 249 | if (idx >= ARRAY_SIZE(dev->wcid)) | ^~ drivers/net/wireless/mediatek/mt76/mt76x0/../mt76x02.h:249:10: warning: comparison is always false due to limited range of data type [-Wtype-limits] 249 | if (idx >= ARRAY_SIZE(dev->wcid)) | ^~ include/linux/compiler.h:58:61: note: in definition of macro '__trace_if_var' 58 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) | ^~~~ 249 | if (idx >= ARRAY_SIZE(dev->wcid)) | ^~ drivers/net/wireless/mediatek/mt76/mt76x0/../mt76x02.h:249:10: warning: comparison is always false due to limited range of data type [-Wtype-limits] 249 | if (idx >= ARRAY_SIZE(dev->wcid)) | ^~ include/linux/compiler.h:69:3: note: in definition of macro '__trace_if_value' 69 | (cond) ? | ^~~~ include/linux/compiler.h:56:28: note: in expansion of macro '__trace_if_var' 56 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) | ^~~~~~~~~~~~~~ 249 | if (idx >= ARRAY_SIZE(dev->wcid)) | ^~ -- In file included from include/linux/export.h:43, from include/linux/linkage.h:7, from include/linux/kernel.h:8, from drivers/net/wireless/mediatek/mt76/mt76x0/phy.c:9: drivers/net/wireless/mediatek/mt76/mt76x0/../mt76x02.h: In function 'mt76x02_rx_get_sta': drivers/net/wireless/mediatek/mt76/mt76x0/../mt76x02.h:249:10: warning: comparison is always false due to limited range of data type [-Wtype-limits] 249 | if (idx >= ARRAY_SIZE(dev->wcid)) | ^~ include/linux/compiler.h:58:52: note: in definition of macro '__trace_if_var' 58 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) | ^~~~ 249 | if (idx >= ARRAY_SIZE(dev->wcid)) | ^~ drivers/net/wireless/mediatek/mt76/mt76x0/../mt76x02.h:249:10: warning: comparison is always false due to limited range of data type [-Wtype-limits] 249 | if (idx >= ARRAY_SIZE(dev->wcid)) | ^~ include/linux/compiler.h:58:61: note: in definition of macro '__trace_if_var' 58 | #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) | ^~~~ 249 | if (idx >= ARRAY_SIZE(dev->wcid)) | ^~ drivers/net/wireless/mediatek/mt76/mt76x0/../mt76x02.h:249:10: warning: comparison is always false due to limited range of data type [-Wtype-limits] 249 | if (idx >= ARRAY_SIZE(dev->wcid)) | ^~ include/linux/compiler.h:69:3: note: in definition of macro '__trace_if_value' 69 | (cond) ? | ^~~~ include/linux/compiler.h:56:28: note: in expansion of macro '__trace_if_var' 56 | #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) | ^~~~~~~~~~~~~~ 249 | if (idx >= ARRAY_SIZE(dev->wcid)) | ^~ In file included from drivers/net/wireless/mediatek/mt76/mt76x0/phy.c:16: At top level: drivers/net/wireless/mediatek/mt76/mt76x0/initvals.h:218:35: warning: 'mt76x0_dcoc_tab' defined but not used [-Wunused-const-variable=] 218 | static const struct mt76_reg_pair mt76x0_dcoc_tab[] = { | ^~~~~~~~~~~~~~~ drivers/net/wireless/mediatek/mt76/mt76x0/initvals.h:86:35: warning: 'mt76x0_bbp_init_tab' defined but not used [-Wunused-const-variable=] 86 | static const struct mt76_reg_pair mt76x0_bbp_init_tab[] = { | ^~~~~~~~~~~~~~~~~~~ drivers/net/wireless/mediatek/mt76/mt76x0/initvals.h:48:35: warning: 'mt76x0_mac_reg_table' defined but not used [-Wunused-const-variable=] 48 | static const struct mt76_reg_pair mt76x0_mac_reg_table[] = { | ^~~~~~~~~~~~~~~~~~~~ drivers/net/wireless/mediatek/mt76/mt76x0/initvals.h:14:35: warning: 'common_mac_reg_table' defined but not used [-Wunused-const-variable=] 14 | static const struct mt76_reg_pair common_mac_reg_table[] = { | ^~~~~~~~~~~~~~~~~~~~ vim +/if +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