smack_superblock
struct superblock_smack *sbsp = smack_superblock(inode->i_sb);
struct superblock_smack *sbsp = smack_superblock(sbp);
sbsp = smack_superblock(file_inode(file)->i_sb);
sbsp = smack_superblock(sbp);
struct superblock_smack *sbsp = smack_superblock(sb);
sbsp = smack_superblock(reference);
struct superblock_smack *sp = smack_superblock(sb);
struct superblock_smack *sbp = smack_superblock(dentry->d_sb);
sbsp = smack_superblock(inode->i_sb);