tree: https://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git binderfs_new_mount_api head: 5d31c6d544596d35ccd6b9d200bc350c8ac30870 commit: 5d31c6d544596d35ccd6b9d200bc350c8ac30870 [1/1] binderfs: port to new mount api config: m68k-allmodconfig (attached as .config) compiler: m68k-linux-gcc (GCC) 9.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 5d31c6d544596d35ccd6b9d200bc350c8ac30870 # save the attached .config to linux build tree GCC_VERSION=9.2.0 make.cross ARCH=m68k If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): drivers/android/binderfs.c: In function 'binderfs_parse_param': 283 | int max_devices; | ^~~ drivers/android/binderfs.c:283:6: warning: unused variable 'max_devices' [-Wunused-variable] 283 | int max_devices; | ^~~~~~~~~~~ drivers/android/binderfs.c: At top level: 348 | .put_super = binderfs_put_super, | ^~~~~~~~~~~~~~~~~~ | binderfs_kill_super 739 | .free_fc = binderfs_free_fc, | ^~~~~~~ | free drivers/android/binderfs.c:333:13: warning: 'binderfs_kill_super' defined but not used [-Wunused-function] 333 | static void binderfs_kill_super(struct super_block *sb) | ^~~~~~~~~~~~~~~~~~~ vim +348 drivers/android/binderfs.c 265 266 /** 267 * binderfs_parse_param - parse binderfs mount options 268 */ 269 static int binderfs_parse_param(struct fs_context *fc, 270 struct fs_parameter *param) 271 { 272 int opt; 273 struct binderfs_mount_opts *ctx = fc->fs_private; 274 struct fs_parse_result result; 275 276 ctx->max = BINDERFS_MAX_MINOR; 277 ctx->stats_mode = STATS_NONE; 278 279 opt = fs_parse(fc, binderfs_fs_parameters, param, &result); 280 if (opt < 0) 281 return opt; 282 284 285 switch (opt) { 286 case Opt_max: 287 if (result.uint_32 > BINDERFS_MAX_MINOR) 288 return invalfc(fc, "Bad value for '%s'", param->key); 289 290 ctx->max = result.uint_32; 291 break; 292 case Opt_stats_mode: 293 if (strcmp(param->string, "global")) 294 return invalfc(fc, "Bad value for '%s'", param->key); 295 296 if (!capable(CAP_SYS_ADMIN)) 297 return -EPERM; 298 299 ctx->stats_mode = STATS_GLOBAL; 300 break; 301 default: 302 return invalfc(fc, "Unsupported parameter '%s'", param->key); 303 } 304 305 return 0; 306 } 307 308 static int binderfs_reconfigure(struct fs_context *fc) 309 { 310 struct binderfs_mount_opts *ctx = fc->fs_private; 311 struct binderfs_info *info = BINDERFS_SB(fc->root->d_sb); 312 313 if (info->mount_opts.stats_mode != ctx->stats_mode) 314 return invalfc(fc, "Binderfs stats mode cannot be changed during a remount"); 315 316 info->mount_opts.stats_mode = ctx->stats_mode; 317 return 0; 318 } 319 320 static int binderfs_show_options(struct seq_file *seq, struct dentry *root) 321 { 322 struct binderfs_info *info; 323 324 info = BINDERFS_SB(root->d_sb); 325 if (info->mount_opts.max <= BINDERFS_MAX_MINOR) 326 seq_printf(seq, ",max=%d", info->mount_opts.max); 327 if (info->mount_opts.stats_mode == STATS_GLOBAL) 328 seq_printf(seq, ",stats=global"); 329 330 return 0; 331 } 332 333 static void binderfs_kill_super(struct super_block *sb) 334 { 335 struct binderfs_info *info = sb->s_fs_info; 336 337 if (info && info->ipc_ns) 338 put_ipc_ns(info->ipc_ns); 339 340 kfree(info); 341 sb->s_fs_info = NULL; 342 } 343 344 static const struct super_operations binderfs_super_ops = { 345 .evict_inode = binderfs_evict_inode, 346 .show_options = binderfs_show_options, 347 .statfs = simple_statfs, 349 }; 350 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org