Btrfs: get rid of btrfs_symlink_aops

The only aops we define for symlinks are identical to the aops for
regular files. This has been the case since symlink support was added in
commit 2b8d99a7 ("Btrfs: symlinks and hard links"). As far as I can
tell, there wasn't a good reason to have separate aops then, and there
isn't now, so let's just do what most other filesystems do and reuse the
same structure.
Signed-off-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/inode.c

@@ -64,7 +64,6 @@ static const struct inode_operations btrfs_dir_ro_inode_operations;
 static const struct inode_operations btrfs_special_inode_operations;
 static const struct inode_operations btrfs_file_inode_operations;
 static const struct address_space_operations btrfs_aops;
-static const struct address_space_operations btrfs_symlink_aops;
 static const struct file_operations btrfs_dir_file_operations;
 static const struct extent_io_ops btrfs_extent_io_ops;
 
@@ -3733,7 +3732,7 @@ static int btrfs_read_locked_inode(struct inode *inode)
 	case S_IFLNK:
 		inode->i_op = &btrfs_symlink_inode_operations;
 		inode_nohighmem(inode);
-		inode->i_mapping->a_ops = &btrfs_symlink_aops;
+		inode->i_mapping->a_ops = &btrfs_aops;
 		break;
 	default:
 		inode->i_op = &btrfs_special_inode_operations;
@@ -10174,7 +10173,7 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
 
 	inode->i_op = &btrfs_symlink_inode_operations;
 	inode_nohighmem(inode);
-	inode->i_mapping->a_ops = &btrfs_symlink_aops;
+	inode->i_mapping->a_ops = &btrfs_aops;
 	inode_set_bytes(inode, name_len);
 	btrfs_i_size_write(BTRFS_I(inode), name_len);
 	err = btrfs_update_inode(trans, root, inode);
@@ -10550,13 +10549,6 @@ static const struct address_space_operations btrfs_aops = {
 	.error_remove_page = generic_error_remove_page,
 };
 
-static const struct address_space_operations btrfs_symlink_aops = {
-	.readpage	= btrfs_readpage,
-	.writepage	= btrfs_writepage,
-	.invalidatepage = btrfs_invalidatepage,
-	.releasepage	= btrfs_releasepage,
-};
-
 static const struct inode_operations btrfs_file_inode_operations = {
 	.getattr	= btrfs_getattr,
 	.setattr	= btrfs_setattr,