EXPORT_SYMBOL radix_tree_replace_slot

It will be used in drivers/md/raid5-cache.c
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Shaohua Li <shli@fb.com>

lib/radix-tree.c

@@ -1102,6 +1102,7 @@ void radix_tree_replace_slot(struct radix_tree_root *root,
 {
 	replace_slot(root, NULL, slot, item, true);
 }
+EXPORT_SYMBOL(radix_tree_replace_slot);
 
 /**
  * radix_tree_iter_replace - replace item in a slot