fs/adfs: map: factor out map cleanup

We have several places which deal with releasing the map buffers and
freeing the map array.  Provide a helper for this.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/adfs/adfs.h

@@ -147,6 +147,7 @@ int adfs_notify_change(struct dentry *dentry, struct iattr *attr);
 int adfs_map_lookup(struct super_block *sb, u32 frag_id, unsigned int offset);
 void adfs_map_statfs(struct super_block *sb, struct kstatfs *buf);
 struct adfs_discmap *adfs_read_map(struct super_block *sb, struct adfs_discrecord *dr);
+void adfs_free_map(struct super_block *sb);
 
 /* Misc */
 __printf(3, 4)

fs/adfs/map.c

@@ -421,3 +421,11 @@ struct adfs_discmap *adfs_read_map(struct super_block *sb, struct adfs_discrecor
 	kfree(dm);
 	return ERR_PTR(-EIO);
 }
+
+void adfs_free_map(struct super_block *sb)
+{
+	struct adfs_sb_info *asb = ADFS_SB(sb);
+
+	adfs_map_relse(asb->s_map, asb->s_map_size);
+	kfree(asb->s_map);
+}

fs/adfs/super.c

@@ -90,12 +90,9 @@ static int adfs_checkdiscrecord(struct adfs_discrecord *dr)
 
 static void adfs_put_super(struct super_block *sb)
 {
-	int i;
 	struct adfs_sb_info *asb = ADFS_SB(sb);
 
-	for (i = 0; i < asb->s_map_size; i++)
-		brelse(asb->s_map[i].dm_bh);
-	kfree(asb->s_map);
+	adfs_free_map(sb);
 	kfree_rcu(asb, rcu);
 }
 
@@ -412,10 +409,7 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent)
 	root = adfs_iget(sb, &root_obj);
 	sb->s_root = d_make_root(root);
 	if (!sb->s_root) {
-		int i;
-		for (i = 0; i < asb->s_map_size; i++)
-			brelse(asb->s_map[i].dm_bh);
-		kfree(asb->s_map);
+		adfs_free_map(sb);
 		adfs_error(sb, "get root inode failed\n");
 		ret = -EIO;
 		goto error;