tree: https://android.googlesource.com/kernel/goldfish android-3.18 head: 145dffbee46bf9294a60c79e32c2397b27a6853e commit: a6cb2a3ff14ca4b576a826eddd79006fcfc9f1b2 [349/362] staging: wlan-ng: add missing byte order conversion config: x86_64-randconfig-s021-20201103 (attached as .config) compiler: gcc-5 (Ubuntu 5.5.0-12ubuntu1) 5.5.0 20171010 reproduce: # apt-get install sparse # sparse version: v0.6.3-107-gaf3512a6-dirty git remote add android-goldfish https://android.googlesource.com/kernel/goldfish git fetch --no-tags android-goldfish android-3.18 git checkout a6cb2a3ff14ca4b576a826eddd79006fcfc9f1b2 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; "sparse warnings: (new ones prefixed by >>)" drivers/staging/wlan-ng/p80211netdev.c:361:24: sparse: sparse: restricted __be16 degrades to integer drivers/staging/wlan-ng/p80211netdev.c:372:16: sparse: sparse: restricted __be16 degrades to integer In file included from drivers/staging/wlan-ng/p80211netdev.c:54:0: include/linux/sched.h:1067:42: warning: type qualifiers ignored on function return type [-Wignored-qualifiers] const struct sched_group_energy * const(*sched_domain_energy_f)(int cpu); ^ arch/x86/include/asm/bitops.h: Assembler messages: arch/x86/include/asm/bitops.h:211: Warning: no instruction mnemonic suffix given and no register operands; using default for `bts' vim +235 drivers/staging/wlan-ng/p80211netdev.c 220 221 /** 222 * p80211_convert_to_ether - conversion from 802.11 frame to ethernet frame 223 * @wlandev: pointer to WLAN device 224 * @skb: pointer to socket buffer 225 * 226 * Returns: 0 if conversion succeeded 227 * CONV_TO_ETHER_FAILED if conversion failed 228 * CONV_TO_ETHER_SKIPPED if frame is ignored 229 */ 230 static int p80211_convert_to_ether(wlandevice_t *wlandev, struct sk_buff *skb) 231 { 232 struct p80211_hdr_a3 *hdr; 233 234 hdr = (struct p80211_hdr_a3 *) skb->data; 236 return CONV_TO_ETHER_SKIPPED; 237 238 /* perform mcast filtering: allow my local address through but reject 239 * anything else that isn't multicast 240 */ 241 if (wlandev->netdev->flags & IFF_ALLMULTI) { 242 if (!ether_addr_equal_unaligned(wlandev->netdev->dev_addr, 243 hdr->a1)) { 244 if (!is_multicast_ether_addr(hdr->a1)) 245 return CONV_TO_ETHER_SKIPPED; 246 } 247 } 248 249 if (skb_p80211_to_ether(wlandev, wlandev->ethconv, skb) == 0) { 250 skb->dev->last_rx = jiffies; 251 wlandev->netdev->stats.rx_packets++; 252 wlandev->netdev->stats.rx_bytes += skb->len; 253 netif_rx_ni(skb); 254 return 0; 255 } 256 257 netdev_dbg(wlandev->netdev, "p80211_convert_to_ether failed.\n"); 258 return CONV_TO_ETHER_FAILED; 259 } 260 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org