tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 180eca540ae06246d594bdd8d8213426a259cc8c commit: 7f7aa94bcaf03d0f18a6853d8f7dad6a4d25bbd6 mac80211: reduce peer HE MCS/NSS to own capabilities date: 9 months ago config: mips-randconfig-r002-20211031 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d321548c3ce987f4f21350ba1c81fdb5d4354224) 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 mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7f7aa94bcaf03d0f18a6853d8f7dad6a4d25bbd6 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 7f7aa94bcaf03d0f18a6853d8f7dad6a4d25bbd6 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): In file included from net/mac80211/he.c:9: In file included from net/mac80211/ieee80211_i.h:16: In file included from include/linux/if_ether.h:19: In file included from include/linux/skbuff.h:17: In file included from include/linux/bvec.h:14: In file included from include/linux/mm.h:33: In file included from include/linux/pgtable.h:6: arch/mips/include/asm/pgtable.h:202:3: warning: converting the result of '<<' to a boolean always evaluates to true [-Wtautological-constant-compare] arch/mips/include/asm/cmpxchg.h:220:2: note: expanded from macro 'cmpxchg64' cmpxchg((ptr), (o), (n)); \ ^ arch/mips/include/asm/cmpxchg.h:204:7: note: expanded from macro 'cmpxchg' if (!__SYNC_loongson3_war) \ ^ arch/mips/include/asm/sync.h:147:34: note: expanded from macro '__SYNC_loongson3_war' # define __SYNC_loongson3_war (1 << 31) ^ In file included from net/mac80211/he.c:9: In file included from net/mac80211/ieee80211_i.h:16: In file included from include/linux/if_ether.h:19: In file included from include/linux/skbuff.h:28: In file included from include/net/checksum.h:22: arch/mips/include/asm/checksum.h:161:9: error: unsupported inline asm: input with type 'unsigned long' matching output with type '__wsum' (aka 'unsigned int') : "0" ((__force unsigned long)daddr), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from net/mac80211/he.c:9: In file included from net/mac80211/ieee80211_i.h:19: include/linux/netdevice.h:559:11: warning: converting the result of '<<' to a boolean always evaluates to true [-Wtautological-constant-compare] } while (cmpxchg(&n->state, val, new) != val); ^ arch/mips/include/asm/cmpxchg.h:194:7: note: expanded from macro 'cmpxchg' if (!__SYNC_loongson3_war) \ ^ arch/mips/include/asm/sync.h:147:34: note: expanded from macro '__SYNC_loongson3_war' # define __SYNC_loongson3_war (1 << 31) ^ In file included from net/mac80211/he.c:9: In file included from net/mac80211/ieee80211_i.h:19: include/linux/netdevice.h:559:11: warning: converting the result of '<<' to a boolean always evaluates to true [-Wtautological-constant-compare] arch/mips/include/asm/cmpxchg.h:204:7: note: expanded from macro 'cmpxchg' if (!__SYNC_loongson3_war) \ ^ arch/mips/include/asm/sync.h:147:34: note: expanded from macro '__SYNC_loongson3_war' # define __SYNC_loongson3_war (1 << 31) ^ In file included from net/mac80211/he.c:9: In file included from net/mac80211/ieee80211_i.h:30: In file included from include/net/mac80211.h:22: In file included from include/net/codel.h:48: In file included from include/net/inet_ecn.h:9: In file included from include/net/inet_sock.h:22: In file included from include/net/sock.h:61: include/linux/poll.h:142:27: warning: division by zero is undefined [-Wdivision-by-zero] M(RDNORM) | M(RDBAND) | M(WRNORM) | M(WRBAND) | ^~~~~~~~~ include/linux/poll.h:140:32: note: expanded from macro 'M' #define M(X) (__force __poll_t)__MAP(val, POLL##X, (__force __u16)EPOLL##X) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/poll.h:126:51: note: expanded from macro '__MAP' (from < to ? (v & from) * (to/from) : (v & from) / (from/to)) ^ ~~~~~~~~~ include/linux/poll.h:142:39: warning: division by zero is undefined [-Wdivision-by-zero] M(RDNORM) | M(RDBAND) | M(WRNORM) | M(WRBAND) | ^~~~~~~~~ include/linux/poll.h:140:32: note: expanded from macro 'M' #define M(X) (__force __poll_t)__MAP(val, POLL##X, (__force __u16)EPOLL##X) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/poll.h:126:51: note: expanded from macro '__MAP' (from < to ? (v & from) * (to/from) : (v & from) / (from/to)) ^ ~~~~~~~~~ In file included from net/mac80211/he.c:9: In file included from net/mac80211/ieee80211_i.h:30: In file included from include/net/mac80211.h:22: In file included from include/net/codel.h:48: In file included from include/net/inet_ecn.h:9: In file included from include/net/inet_sock.h:22: include/net/sock.h:1994:12: warning: converting the result of '<<' to a boolean always evaluates to true [-Wtautological-constant-compare] old_dst = xchg((__force struct dst_entry **)&sk->sk_dst_cache, dst); ^ arch/mips/include/asm/cmpxchg.h:102:7: note: expanded from macro 'xchg' if (!__SYNC_loongson3_war) \ ^ arch/mips/include/asm/sync.h:147:34: note: expanded from macro '__SYNC_loongson3_war' # define __SYNC_loongson3_war (1 << 31) ^ In file included from net/mac80211/he.c:9: In file included from net/mac80211/ieee80211_i.h:30: In file included from include/net/mac80211.h:22: In file included from include/net/codel.h:48: In file included from include/net/inet_ecn.h:9: In file included from include/net/inet_sock.h:22: include/net/sock.h:2244:8: warning: converting the result of '<<' to a boolean always evaluates to true [-Wtautological-constant-compare] err = xchg(&sk->sk_err, 0); ^ arch/mips/include/asm/cmpxchg.h:102:7: note: expanded from macro 'xchg' if (!__SYNC_loongson3_war) \ ^ arch/mips/include/asm/sync.h:147:34: note: expanded from macro '__SYNC_loongson3_war' # define __SYNC_loongson3_war (1 << 31) ^ >> net/mac80211/he.c:158:33: warning: taking address of packed member 'rx_mcs_80' of class or structure 'ieee80211_he_mcs_nss_supp' may result in an unaligned pointer value [-Waddress-of-packed-member] ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_80, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ net/mac80211/he.c:159:12: warning: taking address of packed member 'rx_mcs_80' of class or structure 'ieee80211_he_mcs_nss_supp' may result in an unaligned pointer value [-Waddress-of-packed-member] &he_cap->he_mcs_nss_supp.rx_mcs_80, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> net/mac80211/he.c:160:12: warning: taking address of packed member 'tx_mcs_80' of class or structure 'ieee80211_he_mcs_nss_supp' may result in an unaligned pointer value [-Waddress-of-packed-member] &own_he_cap.he_mcs_nss_supp.tx_mcs_80, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ net/mac80211/he.c:161:12: warning: taking address of packed member 'tx_mcs_80' of class or structure 'ieee80211_he_mcs_nss_supp' may result in an unaligned pointer value [-Waddress-of-packed-member] &he_cap->he_mcs_nss_supp.tx_mcs_80); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> net/mac80211/he.c:169:34: warning: taking address of packed member 'rx_mcs_160' of class or structure 'ieee80211_he_mcs_nss_supp' may result in an unaligned pointer value [-Waddress-of-packed-member] ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_160, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ net/mac80211/he.c:170:13: warning: taking address of packed member 'rx_mcs_160' of class or structure 'ieee80211_he_mcs_nss_supp' may result in an unaligned pointer value [-Waddress-of-packed-member] &he_cap->he_mcs_nss_supp.rx_mcs_160, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> net/mac80211/he.c:171:13: warning: taking address of packed member 'tx_mcs_160' of class or structure 'ieee80211_he_mcs_nss_supp' may result in an unaligned pointer value [-Waddress-of-packed-member] &own_he_cap.he_mcs_nss_supp.tx_mcs_160, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ net/mac80211/he.c:172:13: warning: taking address of packed member 'tx_mcs_160' of class or structure 'ieee80211_he_mcs_nss_supp' may result in an unaligned pointer value [-Waddress-of-packed-member] &he_cap->he_mcs_nss_supp.tx_mcs_160); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ net/mac80211/he.c:174:29: warning: taking address of packed member 'rx_mcs_160' of class or structure 'ieee80211_he_mcs_nss_supp' may result in an unaligned pointer value [-Waddress-of-packed-member] ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.rx_mcs_160); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ net/mac80211/he.c:175:29: warning: taking address of packed member 'tx_mcs_160' of class or structure 'ieee80211_he_mcs_nss_supp' may result in an unaligned pointer value [-Waddress-of-packed-member] ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.tx_mcs_160); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> net/mac80211/he.c:186:34: warning: taking address of packed member 'rx_mcs_80p80' of class or structure 'ieee80211_he_mcs_nss_supp' may result in an unaligned pointer value [-Waddress-of-packed-member] ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_80p80, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ net/mac80211/he.c:187:13: warning: taking address of packed member 'rx_mcs_80p80' of class or structure 'ieee80211_he_mcs_nss_supp' may result in an unaligned pointer value [-Waddress-of-packed-member] &he_cap->he_mcs_nss_supp.rx_mcs_80p80, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ >> net/mac80211/he.c:188:13: warning: taking address of packed member 'tx_mcs_80p80' of class or structure 'ieee80211_he_mcs_nss_supp' may result in an unaligned pointer value [-Waddress-of-packed-member] &own_he_cap.he_mcs_nss_supp.tx_mcs_80p80, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ net/mac80211/he.c:189:13: warning: taking address of packed member 'tx_mcs_80p80' of class or structure 'ieee80211_he_mcs_nss_supp' may result in an unaligned pointer value [-Waddress-of-packed-member] &he_cap->he_mcs_nss_supp.tx_mcs_80p80); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ net/mac80211/he.c:191:29: warning: taking address of packed member 'rx_mcs_80p80' of class or structure 'ieee80211_he_mcs_nss_supp' may result in an unaligned pointer value [-Waddress-of-packed-member] ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.rx_mcs_80p80); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ net/mac80211/he.c:192:29: warning: taking address of packed member 'tx_mcs_80p80' of class or structure 'ieee80211_he_mcs_nss_supp' may result in an unaligned pointer value [-Waddress-of-packed-member] ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.tx_mcs_80p80); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 34 warnings and 1 error generated. vim +158 net/mac80211/he.c 105 106 void 107 ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata, 108 struct ieee80211_supported_band *sband, 109 const u8 *he_cap_ie, u8 he_cap_len, 110 const struct ieee80211_he_6ghz_capa *he_6ghz_capa, 111 struct sta_info *sta) 112 { 113 struct ieee80211_sta_he_cap *he_cap = &sta->sta.he_cap; 114 struct ieee80211_sta_he_cap own_he_cap = sband->iftype_data->he_cap; 115 struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie; 116 u8 he_ppe_size; 117 u8 mcs_nss_size; 118 u8 he_total_size; 119 bool own_160, peer_160, own_80p80, peer_80p80; 120 121 memset(he_cap, 0, sizeof(*he_cap)); 122 123 if (!he_cap_ie || !ieee80211_get_he_sta_cap(sband)) 124 return; 125 126 /* Make sure size is OK */ 127 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap_ie_elem); 128 he_ppe_size = 129 ieee80211_he_ppe_size(he_cap_ie[sizeof(he_cap->he_cap_elem) + 130 mcs_nss_size], 131 he_cap_ie_elem->phy_cap_info); 132 he_total_size = sizeof(he_cap->he_cap_elem) + mcs_nss_size + 133 he_ppe_size; 134 if (he_cap_len < he_total_size) 135 return; 136 137 memcpy(&he_cap->he_cap_elem, he_cap_ie, sizeof(he_cap->he_cap_elem)); 138 139 /* HE Tx/Rx HE MCS NSS Support Field */ 140 memcpy(&he_cap->he_mcs_nss_supp, 141 &he_cap_ie[sizeof(he_cap->he_cap_elem)], mcs_nss_size); 142 143 /* Check if there are (optional) PPE Thresholds */ 144 if (he_cap->he_cap_elem.phy_cap_info[6] & 145 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) 146 memcpy(he_cap->ppe_thres, 147 &he_cap_ie[sizeof(he_cap->he_cap_elem) + mcs_nss_size], 148 he_ppe_size); 149 150 he_cap->has_he = true; 151 152 sta->cur_max_bandwidth = ieee80211_sta_cap_rx_bw(sta); 153 sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta); 154 155 if (sband->band == NL80211_BAND_6GHZ && he_6ghz_capa) 156 ieee80211_update_from_he_6ghz_capa(he_6ghz_capa, sta); 157 > 158 ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_80, > 159 &he_cap->he_mcs_nss_supp.rx_mcs_80, > 160 &own_he_cap.he_mcs_nss_supp.tx_mcs_80, > 161 &he_cap->he_mcs_nss_supp.tx_mcs_80); 162 163 own_160 = own_he_cap.he_cap_elem.phy_cap_info[0] & 164 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 165 peer_160 = he_cap->he_cap_elem.phy_cap_info[0] & 166 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 167 168 if (peer_160 && own_160) { > 169 ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_160, 170 &he_cap->he_mcs_nss_supp.rx_mcs_160, > 171 &own_he_cap.he_mcs_nss_supp.tx_mcs_160, > 172 &he_cap->he_mcs_nss_supp.tx_mcs_160); 173 } else if (peer_160 && !own_160) { 174 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.rx_mcs_160); > 175 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.tx_mcs_160); 176 he_cap->he_cap_elem.phy_cap_info[0] &= 177 ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 178 } 179 180 own_80p80 = own_he_cap.he_cap_elem.phy_cap_info[0] & 181 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G; 182 peer_80p80 = he_cap->he_cap_elem.phy_cap_info[0] & 183 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G; 184 185 if (peer_80p80 && own_80p80) { > 186 ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_80p80, 187 &he_cap->he_mcs_nss_supp.rx_mcs_80p80, > 188 &own_he_cap.he_mcs_nss_supp.tx_mcs_80p80, 189 &he_cap->he_mcs_nss_supp.tx_mcs_80p80); 190 } else if (peer_80p80 && !own_80p80) { 191 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.rx_mcs_80p80); 192 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.tx_mcs_80p80); 193 he_cap->he_cap_elem.phy_cap_info[0] &= 194 ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G; 195 } 196 } 197 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org