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: x86_64-randconfig-s021-20210322 (attached as .config) compiler: gcc-5 (Ubuntu 5.5.0-12ubuntu1) 5.5.0 20171010 reproduce: # apt-get install sparse # sparse version: v0.6.3-277-gc089cd2d-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 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 >>) net/batman-adv/debugfs.c:507:63: sparse: expected char *new_name net/batman-adv/debugfs.c:507:63: sparse: got char const *name 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