5 files changed, 17 insertions, 12 deletions

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 8123b03b1f9d..548cb540e516 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1078,7 +1078,7 @@ 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, root->nodesize);
+        buf = btrfs_find_create_tree_block(root, bytenr);
         if (!buf)
                 return;
         read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree,
@@ -1094,7 +1094,7 @@ int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr,
         struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree;
         int ret;
 
-        buf = btrfs_find_create_tree_block(root, bytenr, root->nodesize);
+        buf = btrfs_find_create_tree_block(root, bytenr);
         if (!buf)
                 return 0;
 
@@ -1125,12 +1125,12 @@ struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,
 }
 
 struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
-                                                 u64 bytenr, u32 blocksize)
+                                                 u64 bytenr)
 {
         if (btrfs_test_is_dummy_root(root))
                 return alloc_test_extent_buffer(root->fs_info, bytenr,
-                                                blocksize);
-        return alloc_extent_buffer(root->fs_info, bytenr, blocksize);
+                                                root->nodesize);
+        return alloc_extent_buffer(root->fs_info, bytenr, root->nodesize);
 }
 
 
@@ -1152,7 +1152,7 @@ struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
         struct extent_buffer *buf = NULL;
         int ret;
 
-        buf = btrfs_find_create_tree_block(root, bytenr, root->nodesize);
+        buf = btrfs_find_create_tree_block(root, bytenr);
         if (!buf)
                 return NULL;
 
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index 4d4ecdd9f4a2..27d44c0fd236 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -50,7 +50,7 @@ void readahead_tree_block(struct btrfs_root *root, u64 bytenr);
 int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr,
                          int mirror_num, struct extent_buffer **eb);
 struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
-                                                   u64 bytenr, u32 blocksize);
+                                                   u64 bytenr);
 void clean_tree_block(struct btrfs_trans_handle *trans,
                       struct btrfs_root *root, struct extent_buffer *buf);
 int open_ctree(struct super_block *sb,
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 50ebc74db508..8ff31f81d870 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -7219,7 +7219,7 @@ btrfs_init_new_buffer(struct btrfs_trans_handle *trans, struct btrfs_root *root,
 {
         struct extent_buffer *buf;
 
-        buf = btrfs_find_create_tree_block(root, bytenr, root->nodesize);
+        buf = btrfs_find_create_tree_block(root, bytenr);
         if (!buf)
                 return ERR_PTR(-ENOMEM);
         btrfs_set_header_generation(buf, trans->transid);
@@ -7825,7 +7825,7 @@ static noinline int do_walk_down(struct btrfs_trans_handle *trans,
 
         next = btrfs_find_tree_block(root, bytenr);
         if (!next) {
-                next = btrfs_find_create_tree_block(root, bytenr, blocksize);
+                next = btrfs_find_create_tree_block(root, bytenr);
                 if (!next)
                         return -ENOMEM;
                 btrfs_set_buffer_lockdep_class(root->root_key.objectid, next,
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 9a02da16f2be..4a42edc224a8 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -2164,7 +2164,7 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans,
                 parent = path->nodes[*level];
                 root_owner = btrfs_header_owner(parent);
 
-                next = btrfs_find_create_tree_block(root, bytenr, blocksize);
+                next = btrfs_find_create_tree_block(root, bytenr);
                 if (!next)
                         return -ENOMEM;
 
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 0144790e296e..f0af9cd0814c 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -6247,8 +6247,13 @@ int btrfs_read_sys_array(struct btrfs_root *root)
         u32 cur;
         struct btrfs_key key;
 
-        sb = btrfs_find_create_tree_block(root, BTRFS_SUPER_INFO_OFFSET,
-                                          BTRFS_SUPER_INFO_SIZE);
+        ASSERT(BTRFS_SUPER_INFO_SIZE <= root->nodesize);
+        /*
+         * This will create extent buffer of nodesize, superblock size is
+         * fixed to BTRFS_SUPER_INFO_SIZE. If nodesize > sb size, this will
+         * overallocate but we can keep it as-is, only the first page is used.
+         */
+        sb = btrfs_find_create_tree_block(root, BTRFS_SUPER_INFO_OFFSET);
         if (!sb)
                 return -ENOMEM;
         btrfs_set_buffer_uptodate(sb);