udf: Switch to single address_space_operations

Now that udf_aops and udf_adiniicb_aops are functionally identical, just
drop udf_adiniicb_aops.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>

fs/udf/file.c

@@ -57,16 +57,6 @@ void udf_adinicb_readpage(struct page *page)
 	kunmap_atomic(kaddr);
 }
 
-const struct address_space_operations udf_adinicb_aops = {
-	.dirty_folio	= block_dirty_folio,
-	.invalidate_folio = block_invalidate_folio,
-	.read_folio	= udf_read_folio,
-	.writepages	= udf_writepages,
-	.write_begin	= udf_write_begin,
-	.write_end	= udf_write_end,
-	.direct_IO	= udf_direct_IO,
-};
-
 static vm_fault_t udf_page_mkwrite(struct vm_fault *vmf)
 {
 	struct vm_area_struct *vma = vmf->vma;

fs/udf/inode.c

@@ -364,8 +364,6 @@ int udf_expand_file_adinicb(struct inode *inode)
 		iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
 	else
 		iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG;
-	/* from now on we have normal address_space methods */
-	inode->i_data.a_ops = &udf_aops;
 	set_page_dirty(page);
 	unlock_page(page);
 	up_write(&iinfo->i_data_sem);
@@ -379,7 +377,6 @@ int udf_expand_file_adinicb(struct inode *inode)
 		kunmap_atomic(kaddr);
 		unlock_page(page);
 		iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB;
-		inode->i_data.a_ops = &udf_adinicb_aops;
 		iinfo->i_lenAlloc = inode->i_size;
 		up_write(&iinfo->i_data_sem);
 	}
@@ -1566,9 +1563,6 @@ static int udf_read_inode(struct inode *inode, bool hidden_inode)
 	case ICBTAG_FILE_TYPE_REGULAR:
 	case ICBTAG_FILE_TYPE_UNDEF:
 	case ICBTAG_FILE_TYPE_VAT20:
-		if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
-			inode->i_data.a_ops = &udf_adinicb_aops;
-		else
 		inode->i_data.a_ops = &udf_aops;
 		inode->i_op = &udf_file_inode_operations;
 		inode->i_fop = &udf_file_operations;

fs/udf/namei.c

@@ -377,9 +377,6 @@ static int udf_create(struct user_namespace *mnt_userns, struct inode *dir,
 	if (IS_ERR(inode))
 		return PTR_ERR(inode);
 
-	if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
-		inode->i_data.a_ops = &udf_adinicb_aops;
-	else
 	inode->i_data.a_ops = &udf_aops;
 	inode->i_op = &udf_file_inode_operations;
 	inode->i_fop = &udf_file_operations;
@@ -396,9 +393,6 @@ static int udf_tmpfile(struct user_namespace *mnt_userns, struct inode *dir,
 	if (IS_ERR(inode))
 		return PTR_ERR(inode);
 
-	if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB)
-		inode->i_data.a_ops = &udf_adinicb_aops;
-	else
 	inode->i_data.a_ops = &udf_aops;
 	inode->i_op = &udf_file_inode_operations;
 	inode->i_fop = &udf_file_operations;

fs/udf/udfdecl.h

@@ -80,7 +80,6 @@ extern const struct inode_operations udf_file_inode_operations;
 extern const struct file_operations udf_file_operations;
 extern const struct inode_operations udf_symlink_inode_operations;
 extern const struct address_space_operations udf_aops;
-extern const struct address_space_operations udf_adinicb_aops;
 extern const struct address_space_operations udf_symlink_aops;
 
 struct udf_fileident_iter {