adfs: don't put inodes into icache

We never look them up in there; inode_fake_hash() will make them appear
hashed for mark_inode_dirty() purposes. And don't leave them around
until memory pressure kicks them out - we never look them up again.

Signed-off-by: Al Viro <[e-mail]>

fs/adfs/inode.c

···
 		ADFS_I(inode)->mmu_private = inode->i_size;
 	}
 
-	insert_inode_hash(inode);
+	inode_fake_hash(inode);
 
 out:
 	return inode;

fs/adfs/super.c

···
 static const struct super_operations adfs_sops = {
 	.alloc_inode	= adfs_alloc_inode,
 	.destroy_inode	= adfs_destroy_inode,
+	.drop_inode	= generic_delete_inode,
 	.write_inode	= adfs_write_inode,
 	.put_super	= adfs_put_super,
 	.statfs		= adfs_statfs,