btrfs: drop private_data parameter from extent_io_tree_init

All callers except one pass NULL, so the parameter can be dropped and
the inode::io_tree initialization can be open coded.
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/disk-io.c

@@ -1044,9 +1044,9 @@ static void __setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info,
 	root->anon_dev = 0;
 	if (!dummy) {
 		extent_io_tree_init(fs_info, &root->dirty_log_pages,
-				    IO_TREE_ROOT_DIRTY_LOG_PAGES, NULL);
+				    IO_TREE_ROOT_DIRTY_LOG_PAGES);
 		extent_io_tree_init(fs_info, &root->log_csum_range,
-				    IO_TREE_LOG_CSUM_RANGE, NULL);
+				    IO_TREE_LOG_CSUM_RANGE);
 	}
 
 	spin_lock_init(&root->root_item_lock);
@@ -2250,7 +2250,7 @@ static void btrfs_init_btree_inode(struct btrfs_fs_info *fs_info)
 
 	RB_CLEAR_NODE(&BTRFS_I(inode)->rb_node);
 	extent_io_tree_init(fs_info, &BTRFS_I(inode)->io_tree,
-			    IO_TREE_BTREE_INODE_IO, NULL);
+			    IO_TREE_BTREE_INODE_IO);
 	extent_map_tree_init(&BTRFS_I(inode)->extent_tree);
 
 	BTRFS_I(inode)->root = btrfs_grab_root(fs_info->tree_root);
@@ -3074,7 +3074,7 @@ void btrfs_init_fs_info(struct btrfs_fs_info *fs_info)
 	fs_info->block_group_cache_tree = RB_ROOT_CACHED;
 
 	extent_io_tree_init(fs_info, &fs_info->excluded_extents,
-			    IO_TREE_FS_EXCLUDED_EXTENTS, NULL);
+			    IO_TREE_FS_EXCLUDED_EXTENTS);
 
 	mutex_init(&fs_info->ordered_operations_mutex);
 	mutex_init(&fs_info->tree_log_mutex);

fs/btrfs/extent-io-tree.c

@@ -94,13 +94,12 @@ struct tree_entry {
 };
 
 void extent_io_tree_init(struct btrfs_fs_info *fs_info,
-			 struct extent_io_tree *tree, unsigned int owner,
-			 void *private_data)
+			 struct extent_io_tree *tree, unsigned int owner)
 {
 	tree->fs_info = fs_info;
 	tree->state = RB_ROOT;
 	spin_lock_init(&tree->lock);
-	tree->private_data = private_data;
+	tree->private_data = NULL;
 	tree->owner = owner;
 	if (owner == IO_TREE_INODE_FILE_EXTENT)
 		lockdep_set_class(&tree->lock, &file_extent_tree_class);

fs/btrfs/extent-io-tree.h

@@ -104,8 +104,7 @@ struct extent_state {
 };
 
 void extent_io_tree_init(struct btrfs_fs_info *fs_info,
-			 struct extent_io_tree *tree, unsigned int owner,
-			 void *private_data);
+			 struct extent_io_tree *tree, unsigned int owner);
 void extent_io_tree_release(struct extent_io_tree *tree);
 
 int lock_extent(struct extent_io_tree *tree, u64 start, u64 end,

fs/btrfs/inode.c

@@ -8871,9 +8871,10 @@ struct inode *btrfs_alloc_inode(struct super_block *sb)
 
 	inode = &ei->vfs_inode;
 	extent_map_tree_init(&ei->extent_tree);
-	extent_io_tree_init(fs_info, &ei->io_tree, IO_TREE_INODE_IO, inode);
+	extent_io_tree_init(fs_info, &ei->io_tree, IO_TREE_INODE_IO);
+	ei->io_tree.private_data = inode;
 	extent_io_tree_init(fs_info, &ei->file_extent_tree,
-			    IO_TREE_INODE_FILE_EXTENT, NULL);
+			    IO_TREE_INODE_FILE_EXTENT);
 	ei->io_failure_tree = RB_ROOT;
 	atomic_set(&ei->sync_writers, 0);
 	mutex_init(&ei->log_mutex);

fs/btrfs/relocation.c

@@ -3928,8 +3928,7 @@ static struct reloc_control *alloc_reloc_control(struct btrfs_fs_info *fs_info)
 	INIT_LIST_HEAD(&rc->dirty_subvol_roots);
 	btrfs_backref_init_cache(fs_info, &rc->backref_cache, 1);
 	mapping_tree_init(&rc->reloc_root_tree);
-	extent_io_tree_init(fs_info, &rc->processed_blocks,
-			    IO_TREE_RELOC_BLOCKS, NULL);
+	extent_io_tree_init(fs_info, &rc->processed_blocks, IO_TREE_RELOC_BLOCKS);
 	return rc;
 }
 

fs/btrfs/tests/btrfs-tests.c

@@ -102,7 +102,7 @@ struct btrfs_device *btrfs_alloc_dummy_device(struct btrfs_fs_info *fs_info)
 	if (!dev)
 		return ERR_PTR(-ENOMEM);
 
-	extent_io_tree_init(NULL, &dev->alloc_state, 0, NULL);
+	extent_io_tree_init(NULL, &dev->alloc_state, 0);
 	INIT_LIST_HEAD(&dev->dev_list);
 	list_add(&dev->dev_list, &fs_info->fs_devices->devices);
 

fs/btrfs/tests/extent-io-tests.c

@@ -132,7 +132,7 @@ static int test_find_delalloc(u32 sectorsize)
 	 * Passing NULL as we don't have fs_info but tracepoints are not used
 	 * at this point
 	 */
-	extent_io_tree_init(NULL, tmp, IO_TREE_SELFTEST, NULL);
+	extent_io_tree_init(NULL, tmp, IO_TREE_SELFTEST);
 
 	/*
 	 * First go through and create and mark all of our pages dirty, we pin
@@ -489,7 +489,7 @@ static int test_find_first_clear_extent_bit(void)
 
 	test_msg("running find_first_clear_extent_bit test");
 
-	extent_io_tree_init(NULL, &tree, IO_TREE_SELFTEST, NULL);
+	extent_io_tree_init(NULL, &tree, IO_TREE_SELFTEST);
 
 	/* Test correct handling of empty tree */
 	find_first_clear_extent_bit(&tree, 0, &start, &end, CHUNK_TRIMMED);

fs/btrfs/transaction.c

@@ -378,9 +378,9 @@ static noinline int join_transaction(struct btrfs_fs_info *fs_info,
 	spin_lock_init(&cur_trans->releasing_ebs_lock);
 	list_add_tail(&cur_trans->list, &fs_info->trans_list);
 	extent_io_tree_init(fs_info, &cur_trans->dirty_pages,
-			IO_TREE_TRANS_DIRTY_PAGES, NULL);
+			IO_TREE_TRANS_DIRTY_PAGES);
 	extent_io_tree_init(fs_info, &cur_trans->pinned_extents,
-			IO_TREE_FS_PINNED_EXTENTS, NULL);
+			IO_TREE_FS_PINNED_EXTENTS);
 	fs_info->generation++;
 	cur_trans->transid = fs_info->generation;
 	fs_info->running_transaction = cur_trans;

fs/btrfs/volumes.c

@@ -7048,8 +7048,7 @@ struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info,
 
 	atomic_set(&dev->dev_stats_ccnt, 0);
 	btrfs_device_data_ordered_init(dev);
-	extent_io_tree_init(fs_info, &dev->alloc_state,
-			    IO_TREE_DEVICE_ALLOC_STATE, NULL);
+	extent_io_tree_init(fs_info, &dev->alloc_state, IO_TREE_DEVICE_ALLOC_STATE);
 
 	if (devid)
 		tmp = *devid;