ext2: Fix i_op setting for special inode

Let's always set special inode i_op to &ext2_special_inode_operations
regardless of CONFIG_EXT2_FS_XATTR setting. It makes sence to be able to
query extended inode flags (needing ->setattr and ->getattr callbacks)
even when CONFIG_EXT2_FS_XATTR is not set.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Chengguang Xu <[email protected]>
Signed-off-by: Jan Kara <[email protected]>

Author: cgxu519

fs/ext2/namei.c

@@ -136,9 +136,7 @@ static int ext2_mknod (struct inode * dir, struct dentry *dentry, umode_t mode,
 	err = PTR_ERR(inode);
 	if (!IS_ERR(inode)) {
 		init_special_inode(inode, inode->i_mode, rdev);
-#ifdef CONFIG_EXT2_FS_XATTR
 		inode->i_op = &ext2_special_inode_operations;
-#endif
 		mark_inode_dirty(inode);
 		err = ext2_add_nondir(dentry, inode);
 	}