diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 56f8c1b1016ae491df21749b441b70d568832788..f697d00819b81fa9911caafc0d75b349d2cafd37 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -3471,8 +3471,6 @@ int __must_check btrfs_update_root(struct btrfs_trans_handle *trans,
 				   struct btrfs_root *root,
 				   struct btrfs_key *key,
 				   struct btrfs_root_item *item);
-void btrfs_read_root_item(struct extent_buffer *eb, int slot,
-			  struct btrfs_root_item *item);
 int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key,
 		    struct btrfs_path *path, struct btrfs_root_item *root_item,
 		    struct btrfs_key *root_key);
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 77a9d46b5cdbf16b5826debd187523b11beab729..f96a237bb40a24ce07ff084bb32b1aa5eb53aad7 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1534,8 +1534,8 @@ int btrfs_init_fs_root(struct btrfs_root *root)
 	return ret;
 }
 
-struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info,
-					u64 root_id)
+static struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info,
+					       u64 root_id)
 {
 	struct btrfs_root *root;
 
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 94362ad5dc491985cb5dea931ce4873557e6e57c..3e7d604004f9cef1d1f86c9c93e88f789f7e10f9 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -1791,7 +1791,7 @@ u64 count_range_bits(struct extent_io_tree *tree,
  * set the private field for a given byte offset in the tree.  If there isn't
  * an extent_state there already, this does nothing.
  */
-int set_state_private(struct extent_io_tree *tree, u64 start, u64 private)
+static int set_state_private(struct extent_io_tree *tree, u64 start, u64 private)
 {
 	struct rb_node *node;
 	struct extent_state *state;
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 3940a0386865f21ec6bcefe2a5f579b944ce49e4..6dbc645f1f3d00e9b05e290aea4ce05e8f95617a 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -263,7 +263,6 @@ int extent_readpages(struct extent_io_tree *tree,
 		     get_extent_t get_extent);
 int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 		__u64 start, __u64 len, get_extent_t *get_extent);
-int set_state_private(struct extent_io_tree *tree, u64 start, u64 private);
 int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private);
 void set_page_extent_mapped(struct page *page);
 
diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c
index 70193d0e7058bd78126873efd2b5044c9ac7abdd..c67b432d867db41c63ce8d0800ad3316fb1487e2 100644
--- a/fs/btrfs/root-tree.c
+++ b/fs/btrfs/root-tree.c
@@ -29,8 +29,8 @@
  * generation numbers as then we know the root was once mounted with an older
  * kernel that was not aware of the root item structure change.
  */
-void btrfs_read_root_item(struct extent_buffer *eb, int slot,
-			  struct btrfs_root_item *item)
+static void btrfs_read_root_item(struct extent_buffer *eb, int slot,
+				struct btrfs_root_item *item)
 {
 	uuid_le uuid;
 	int len;
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index ea8d52212d75470f08f74d068f33486226f18590..579efcc1de16011b07aae6950b3aa176fa8090c3 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -837,7 +837,7 @@ int btrfs_wait_marked_extents(struct btrfs_root *root,
  * them in one of two extent_io trees.  This is used to make sure all of
  * those extents are on disk for transaction or log commit
  */
-int btrfs_write_and_wait_marked_extents(struct btrfs_root *root,
+static int btrfs_write_and_wait_marked_extents(struct btrfs_root *root,
 				struct extent_io_tree *dirty_pages, int mark)
 {
 	int ret;
diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h
index defbc426989787e405e69f6e360fa82b3dc26556..5c2af8491621ced0d1b35110210143a09a1aa418 100644
--- a/fs/btrfs/transaction.h
+++ b/fs/btrfs/transaction.h
@@ -160,8 +160,6 @@ int btrfs_should_end_transaction(struct btrfs_trans_handle *trans,
 void btrfs_throttle(struct btrfs_root *root);
 int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans,
 				struct btrfs_root *root);
-int btrfs_write_and_wait_marked_extents(struct btrfs_root *root,
-				struct extent_io_tree *dirty_pages, int mark);
 int btrfs_write_marked_extents(struct btrfs_root *root,
 				struct extent_io_tree *dirty_pages, int mark);
 int btrfs_wait_marked_extents(struct btrfs_root *root,