BTRFS_FS_CLOSING_DONE 2630 fs/btrfs/ctree.h if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) BTRFS_FS_CLOSING_DONE 4046 fs/btrfs/disk-io.c set_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags);