hi all: why use the struct in this way by "." for example, *.owner* instead of *owner* , why? Thank you. 1203 <http://lxr.oss.org.cn/source/fs/ext2/super.c?v=2.6.16#L1203> static struct file_system_type <http://lxr.oss.org.cn/ident?v=2.6.16;i=file_system_type> ext2_fs_type <http://lxr.oss.org.cn/ident?v=2.6.16;i=ext2_fs_type> = {1204 <http://lxr.oss.org.cn/source/fs/ext2/super.c?v=2.6.16#L1204> .owner = THIS_MODULE <http://lxr.oss.org.cn/ident?v=2.6.16;i=THIS_MODULE>,1205 <http://lxr.oss.org.cn/source/fs/ext2/super.c?v=2.6.16#L1205> .name <http://lxr.oss.org.cn/ident?v=2.6.16;i=name> = *"ext2"*,1206 <http://lxr.oss.org.cn/source/fs/ext2/super.c?v=2.6.16#L1206> .get_sb <http://lxr.oss.org.cn/ident?v=2.6.16;i=get_sb> = ext2_get_sb <http://lxr.oss.org.cn/ident?v=2.6.16;i=ext2_get_sb>,1207 <http://lxr.oss.org.cn/source/fs/ext2/super.c?v=2.6.16#L1207> .kill_sb = kill_block_super <http://lxr.oss.org.cn/ident?v=2.6.16;i=kill_block_super>,1208 <http://lxr.oss.org.cn/source/fs/ext2/super.c?v=2.6.16#L1208> .fs_flags = FS_REQUIRES_DEV <http://lxr.oss.org.cn/ident?v=2.6.16;i=FS_REQUIRES_DEV>,1209 <http://lxr.oss.org.cn/source/fs/ext2/super.c?v=2.6.16#L1209> };1210 <http://lxr.oss.org.cn/source/fs/ext2/super.c?v=2.6.16#L1210>