tree: https://android.googlesource.com/kernel/goldfish android-3.18 head: d03166b0fbc7b4e2f666b01f48aa26b12a5462d8 commit: 9330a80441f617103f18385993619f05fa948b71 [109/182] batman-adv: Fix debugfs path for renamed hardif config: alpha-randconfig-s031-20210120 (attached as .config) compiler: alpha-linux-gcc (GCC) 5.5.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-208-g46a52ca4-dirty git remote add android-goldfish https://android.googlesource.com/kernel/goldfish git fetch --no-tags android-goldfish android-3.18 git checkout 9330a80441f617103f18385993619f05fa948b71 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-5.5.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=alpha 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 >>)" net/batman-adv/debugfs.c:507:63: sparse: expected char *new_name net/batman-adv/debugfs.c:507:63: sparse: got char const *name In file included from include/linux/if_ether.h:23:0, from include/uapi/linux/ethtool.h:17, from include/linux/ethtool.h:16, from include/linux/netdevice.h:43, from net/batman-adv/main.h:169, from net/batman-adv/debugfs.c:18: include/linux/skbuff.h: In function 'skb_can_coalesce': include/linux/skbuff.h:2513:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] off == frag->page_offset + skb_frag_size(frag); ^ In file included from include/uapi/linux/stddef.h:1:0, from include/linux/stddef.h:4, from include/uapi/linux/posix_types.h:4, from include/uapi/linux/types.h:13, from include/linux/types.h:5, from include/linux/thread_info.h:10, from arch/alpha/include/asm/current.h:4, from include/linux/mutex.h:13, from net/batman-adv/main.h:167, from net/batman-adv/debugfs.c:18: include/linux/netdevice.h: In function 'get_netdev_rx_queue_index': include/linux/netdevice.h:2819:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] BUG_ON(index >= dev->num_rx_queues); ^ include/linux/compiler.h:176:42: note: in definition of macro 'unlikely' # define unlikely(x) __builtin_expect(!!(x), 0) ^ include/linux/netdevice.h:2819:2: note: in expansion of macro 'BUG_ON' BUG_ON(index >= dev->num_rx_queues); ^ In file included from net/batman-adv/main.h:169:0, from net/batman-adv/debugfs.c:18: include/linux/netdevice.h: In function 'netif_msg_init': include/linux/netdevice.h:3089:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (debug_value < 0 || debug_value >= (sizeof(u32) * 8)) ^ In file included from include/net/sock.h:63:0, from net/batman-adv/main.h:178, from net/batman-adv/debugfs.c:18: include/linux/filter.h: In function 'bpf_needs_clear_a': include/linux/filter.h:440:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (first->k == SKF_AD_OFF + SKF_AD_ALU_XOR_X) ^ In file included from include/net/rtnetlink.h:5:0, from include/net/neighbour.h:29, from include/net/dst.h:17, from include/net/sock.h:68, from net/batman-adv/main.h:178, from net/batman-adv/debugfs.c:18: include/net/netlink.h: In function 'nlmsg_ok': include/net/netlink.h:334:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] nlh->nlmsg_len <= remaining); ^ include/net/netlink.h: In function 'nlmsg_parse': include/net/netlink.h:369:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (nlh->nlmsg_len < nlmsg_msg_size(hdrlen)) ^ include/net/netlink.h: In function 'nlmsg_validate': include/net/netlink.h:402:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (nlh->nlmsg_len < nlmsg_msg_size(hdrlen)) ^ In file included from include/net/neighbour.h:29:0, from include/net/dst.h:17, from include/net/sock.h:68, from net/batman-adv/main.h:178, from net/batman-adv/debugfs.c:18: include/net/rtnetlink.h: In function 'rtnl_msg_family': include/net/rtnetlink.h:20:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (nlmsg_len(nlh) >= sizeof(struct rtgenmsg)) ^ In file included from net/batman-adv/originator.h:21:0, from net/batman-adv/debugfs.c:25: net/batman-adv/hash.h: In function 'batadv_hash_bytes': net/batman-adv/hash.h:96:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < size; i++) { ^ net/batman-adv/debugfs.c: In function 'batadv_debugfs_rename_hardif': net/batman-adv/debugfs.c:507:56: warning: passing argument 4 of 'debugfs_rename' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] d = debugfs_rename(dir->d_parent, dir, dir->d_parent, name); ^ In file included from net/batman-adv/debugfs.c:21:0: include/linux/debugfs.h:145:30: note: expected 'char *' but argument is of type 'const char *' static inline struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry, ^ vim +507 net/batman-adv/debugfs.c 492 493 /** 494 * batadv_debugfs_rename_hardif() - Fix debugfs path for renamed hardif 495 * @hard_iface: hard interface which was renamed 496 */ 497 void batadv_debugfs_rename_hardif(struct batadv_hard_iface *hard_iface) 498 { 499 const char *name = hard_iface->net_dev->name; 500 struct dentry *dir; 501 struct dentry *d; 502 503 dir = hard_iface->debug_dir; 504 if (!dir) 505 return; 506 508 if (!d) 509 pr_err("Can't rename debugfs dir to %s\n", name); 510 } 511 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org