fs/adfs: mostly divorse inode number from indirect disc address

Avoid using the inode number as the indirect disc address, even though
these currently have the same value.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/adfs/adfs.h

@@ -32,6 +32,7 @@ static inline u16 adfs_filetype(u32 loadaddr)
 struct adfs_inode_info {
 	loff_t		mmu_private;
 	__u32		parent_id;	/* parent indirect disc address	*/
+	__u32		indaddr;	/* object indirect disc address	*/
 	__u32		loadaddr;	/* RISC OS load address		*/
 	__u32		execaddr;	/* RISC OS exec address		*/
 	unsigned int	attr;		/* RISC OS permissions		*/

fs/adfs/dir.c

@@ -158,7 +158,7 @@ static int adfs_dir_read_inode(struct super_block *sb, struct inode *inode,
 {
 	int ret;
 
-	ret = adfs_dir_read(sb, inode->i_ino, inode->i_size, dir);
+	ret = adfs_dir_read(sb, ADFS_I(inode)->indaddr, inode->i_size, dir);
 	if (ret)
 		return ret;
 
@@ -372,7 +372,7 @@ static int adfs_dir_lookup_byname(struct inode *inode, const struct qstr *qstr,
 			break;
 		}
 	}
-	obj->parent_id = inode->i_ino;
+	obj->parent_id = ADFS_I(inode)->indaddr;
 
 unlock_relse:
 	up_read(&adfs_dir_rwsem);

fs/adfs/inode.c

@@ -20,7 +20,8 @@ adfs_get_block(struct inode *inode, sector_t block, struct buffer_head *bh,
 		if (block >= inode->i_blocks)
 			goto abort_toobig;
 
-		block = __adfs_block_map(inode->i_sb, inode->i_ino, block);
+		block = __adfs_block_map(inode->i_sb, ADFS_I(inode)->indaddr,
+					 block);
 		if (block)
 			map_bh(bh, inode->i_sb, block);
 		return 0;
@@ -259,6 +260,7 @@ adfs_iget(struct super_block *sb, struct object_info *obj)
 	 * for cross-directory renames.
 	 */
 	ADFS_I(inode)->parent_id = obj->parent_id;
+	ADFS_I(inode)->indaddr   = obj->indaddr;
 	ADFS_I(inode)->loadaddr  = obj->loadaddr;
 	ADFS_I(inode)->execaddr  = obj->execaddr;
 	ADFS_I(inode)->attr      = obj->attr;
@@ -353,7 +355,7 @@ int adfs_write_inode(struct inode *inode, struct writeback_control *wbc)
 	struct object_info obj;
 	int ret;
 
-	obj.indaddr	= inode->i_ino;
+	obj.indaddr	= ADFS_I(inode)->indaddr;
 	obj.name_len	= 0;
 	obj.parent_id	= ADFS_I(inode)->parent_id;
 	obj.loadaddr	= ADFS_I(inode)->loadaddr;