Hi Liu, [auto build test WARNING on tip/perf/core] [also build test WARNING on v4.9-rc8 next-20161207] [cannot apply to btrfs/next] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Liu-Bo/btrfs-dax-IO/20161208-082651 config: x86_64-randconfig-s2-12081004 (attached as .config) compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All warnings (new ones prefixed by >>): fs/btrfs/super.c: In function 'btrfs_parse_options': >> fs/btrfs/super.c:414: warning: unused variable 'set_bdev' fs/btrfs/super.o: warning: objtool: btrfs_statfs()+0x2af: function has unreachable instruction vim +/set_bdev +414 fs/btrfs/super.c 398 * XXX JDM: This needs to be cleaned up for remount. 399 */ 400 int btrfs_parse_options(struct btrfs_root *root, char *options, 401 unsigned long new_flags) 402 { 403 struct btrfs_fs_info *info = root->fs_info; 404 substring_t args[MAX_OPT_ARGS]; 405 char *p, *num, *orig = NULL; 406 u64 cache_gen; 407 int intarg; 408 int ret = 0; 409 char *compress_type; 410 bool compress_force = false; 411 enum btrfs_compression_type saved_compress_type; 412 bool saved_compress_force; 413 int no_compress = 0; > 414 int set_bdev = 0; 415 416 cache_gen = btrfs_super_cache_generation(root->fs_info->super_copy); 417 if (btrfs_fs_compat_ro(root->fs_info, FREE_SPACE_TREE)) 418 btrfs_set_opt(info->mount_opt, FREE_SPACE_TREE); 419 else if (cache_gen) 420 btrfs_set_opt(info->mount_opt, SPACE_CACHE); 421 422 /* --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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