diff --git a/include/linux/compaction.h b/include/linux/compaction.h
index cc9f7a4286490a3bae2d47db3fe74d2dabfd4aac..bb2bbdbe546495e1f0ab94e87b58578bc5c0c53f 100644
--- a/include/linux/compaction.h
+++ b/include/linux/compaction.h
@@ -24,8 +24,6 @@ extern unsigned long try_to_compact_pages(struct zonelist *zonelist,
 			int order, gfp_t gfp_mask, nodemask_t *mask,
 			bool sync);
 extern unsigned long compaction_suitable(struct zone *zone, int order);
-extern unsigned long compact_zone_order(struct zone *zone, int order,
-					gfp_t gfp_mask, bool sync);
 
 /* Do not skip compaction more than 64 times */
 #define COMPACT_MAX_DEFER_SHIFT 6
@@ -69,12 +67,6 @@ static inline unsigned long compaction_suitable(struct zone *zone, int order)
 	return COMPACT_SKIPPED;
 }
 
-static inline unsigned long compact_zone_order(struct zone *zone, int order,
-					       gfp_t gfp_mask, bool sync)
-{
-	return COMPACT_CONTINUE;
-}
-
 static inline void defer_compaction(struct zone *zone)
 {
 }
diff --git a/mm/compaction.c b/mm/compaction.c
index a0e420207ebff3778fc5c17136dc2d5176391105..899d95638586fcc65b44d631705845bef6245be3 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -582,7 +582,7 @@ static int compact_zone(struct zone *zone, struct compact_control *cc)
 	return ret;
 }
 
-unsigned long compact_zone_order(struct zone *zone,
+static unsigned long compact_zone_order(struct zone *zone,
 				 int order, gfp_t gfp_mask,
 				 bool sync)
 {