diff --git a/arch/arm64/configs/odroidgou_defconfig b/arch/arm64/configs/odroidgou_defconfig
index b0a1f27f6b8ba7..d567cce6e4973f 100644
--- a/arch/arm64/configs/odroidgou_defconfig
+++ b/arch/arm64/configs/odroidgou_defconfig
@@ -2885,7 +2885,7 @@ CONFIG_88XXAU=m
 CONFIG_RTL8188EU=m
 CONFIG_ESP8089=m
 CONFIG_ESP8089_DEBUG_FS=y
-# CONFIG_RTL8821CU is not set
+CONFIG_RTL8821CU=m
 # CONFIG_MAC80211_HWSIM is not set
 CONFIG_USB_NET_RNDIS_WLAN=m
 
@@ -5121,7 +5121,10 @@ CONFIG_USB_ZERO=m
 # CONFIG_USB_ETH is not set
 # CONFIG_USB_G_NCM is not set
 CONFIG_USB_GADGETFS=m
-# CONFIG_USB_FUNCTIONFS is not set
+CONFIG_USB_FUNCTIONFS=m
+CONFIG_USB_FUNCTIONFS_ETH=y
+CONFIG_USB_FUNCTIONFS_RNDIS=y
+CONFIG_USB_FUNCTIONFS_GENERIC=y
 CONFIG_USB_MASS_STORAGE=m
 # CONFIG_USB_G_SERIAL is not set
 # CONFIG_USB_MIDI_GADGET is not set
diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c
index e0c09f3cb88c1c..a772a714df2362 100644
--- a/drivers/base/dma-contiguous.c
+++ b/drivers/base/dma-contiguous.c
@@ -35,6 +35,7 @@
 #endif
 
 struct cma *dma_contiguous_default_area;
+EXPORT_SYMBOL_GPL(dma_contiguous_default_area);
 
 /*
  * Default global CMA area size can be defined in kernel's .config.
diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index 8e6d552c40ddfc..0a84035c6f175b 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -45,6 +45,7 @@ static unsigned long height_to_maxnodes[RADIX_TREE_MAX_PATH + 1] __read_mostly;
  * Radix tree node cache.
  */
 static struct kmem_cache *radix_tree_node_cachep;
+EXPORT_SYMBOL_GPL(radix_tree_node_cachep);
 
 /*
  * The radix tree is variable-height, so an insert operation not only has
@@ -329,6 +330,7 @@ static void radix_tree_node_rcu_free(struct rcu_head *head)
 
 	kmem_cache_free(radix_tree_node_cachep, node);
 }
+EXPORT_SYMBOL_GPL(radix_tree_node_rcu_free);
 
 static inline void
 radix_tree_node_free(struct radix_tree_node *node)
diff --git a/mm/cma.c b/mm/cma.c
index fbd34e0e1afd21..e54045b6dc312a 100644
--- a/mm/cma.c
+++ b/mm/cma.c
@@ -623,6 +623,7 @@ struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align)
 	pr_debug("%s(): returned %p\n", __func__, page);
 	return page;
 }
+EXPORT_SYMBOL(cma_alloc);
 
 /**
  * cma_release() - release allocated pages
@@ -661,4 +662,4 @@ bool cma_release(struct cma *cma, const struct page *pages, unsigned int count)
 
 	return true;
 }
-
+EXPORT_SYMBOL(cma_release);