btrfs: sink blocksize parameter to readahead_tree_block

All callers pass nodesize.
Signed-off-by: David Sterba <dsterba@suse.cz>

fs/btrfs/ctree.c

@@ -2282,7 +2282,7 @@ static void reada_for_search(struct btrfs_root *root,
 		if ((search <= target && target - search <= 65536) ||
 		    (search > target && search - target <= 65536)) {
 			gen = btrfs_node_ptr_generation(node, nr);
-			readahead_tree_block(root, search, blocksize);
+			readahead_tree_block(root, search);
 			nread += blocksize;
 		}
 		nscan++;
@@ -2301,7 +2301,6 @@ static noinline void reada_for_balance(struct btrfs_root *root,
 	u64 gen;
 	u64 block1 = 0;
 	u64 block2 = 0;
-	int blocksize;
 
 	parent = path->nodes[level + 1];
 	if (!parent)
@@ -2309,7 +2308,6 @@ static noinline void reada_for_balance(struct btrfs_root *root,
 
 	nritems = btrfs_header_nritems(parent);
 	slot = path->slots[level + 1];
-	blocksize = root->nodesize;
 
 	if (slot > 0) {
 		block1 = btrfs_node_blockptr(parent, slot - 1);
@@ -2334,9 +2332,9 @@ static noinline void reada_for_balance(struct btrfs_root *root,
 	}
 
 	if (block1)
-		readahead_tree_block(root, block1, blocksize);
+		readahead_tree_block(root, block1);
 	if (block2)
-		readahead_tree_block(root, block2, blocksize);
+		readahead_tree_block(root, block2);
 }
 
 

fs/btrfs/disk-io.c

@@ -1073,12 +1073,12 @@ static const struct address_space_operations btree_aops = {
 	.set_page_dirty = btree_set_page_dirty,
 };
 
-void readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize)
+void readahead_tree_block(struct btrfs_root *root, u64 bytenr)
 {
 	struct extent_buffer *buf = NULL;
 	struct inode *btree_inode = root->fs_info->btree_inode;
 
-	buf = btrfs_find_create_tree_block(root, bytenr, blocksize);
+	buf = btrfs_find_create_tree_block(root, bytenr, root->nodesize);
 	if (!buf)
 		return;
 	read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree,

fs/btrfs/disk-io.h

@@ -46,7 +46,7 @@ struct btrfs_fs_devices;
 
 struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
 				      u64 parent_transid);
-void readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize);
+void readahead_tree_block(struct btrfs_root *root, u64 bytenr);
 int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, u32 blocksize,
 			 int mirror_num, struct extent_buffer **eb);
 struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,

fs/btrfs/extent-tree.c

@@ -7485,7 +7485,7 @@ static noinline void reada_walk_down(struct btrfs_trans_handle *trans,
 				continue;
 		}
 reada:
-		readahead_tree_block(root, bytenr, blocksize);
+		readahead_tree_block(root, bytenr);
 		nread++;
 	}
 	wc->reada_slot = slot;

fs/btrfs/relocation.c

@@ -2965,8 +2965,7 @@ int relocate_tree_blocks(struct btrfs_trans_handle *trans,
 	while (rb_node) {
 		block = rb_entry(rb_node, struct tree_block, rb_node);
 		if (!block->key_ready)
-			readahead_tree_block(rc->extent_root, block->bytenr,
-					block->key.objectid);
+			readahead_tree_block(rc->extent_root, block->bytenr);
 		rb_node = rb_next(rb_node);
 	}