diff --git a/include/linux/mm.h b/include/linux/mm.h
index 17b27cd..378bcce 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1058,19 +1058,20 @@
 /*
  * per-process(per-mm_struct) statistics.
  */
-static inline void set_mm_counter(struct mm_struct *mm, int member, long value)
-{
-	atomic_long_set(&mm->rss_stat.count[member], value);
-}
-
-#if defined(SPLIT_RSS_COUNTING)
-unsigned long get_mm_counter(struct mm_struct *mm, int member);
-#else
 static inline unsigned long get_mm_counter(struct mm_struct *mm, int member)
 {
-	return atomic_long_read(&mm->rss_stat.count[member]);
-}
+	long val = atomic_long_read(&mm->rss_stat.count[member]);
+
+#ifdef SPLIT_RSS_COUNTING
+	/*
+	 * counter is updated in asynchronous manner and may go to minus.
+	 * But it's never be expected number for users.
+	 */
+	if (val < 0)
+		val = 0;
 #endif
+	return (unsigned long)val;
+}
 
 static inline void add_mm_counter(struct mm_struct *mm, int member, long value)
 {
diff --git a/mm/memory.c b/mm/memory.c
index e01abb9..a5de734 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -160,24 +160,6 @@
 		__sync_task_rss_stat(task, task->mm);
 }
 
-unsigned long get_mm_counter(struct mm_struct *mm, int member)
-{
-	long val = 0;
-
-	/*
-	 * Don't use task->mm here...for avoiding to use task_get_mm()..
-	 * The caller must guarantee task->mm is not invalid.
-	 */
-	val = atomic_long_read(&mm->rss_stat.count[member]);
-	/*
-	 * counter is updated in asynchronous manner and may go to minus.
-	 * But it's never be expected number for users.
-	 */
-	if (val < 0)
-		return 0;
-	return (unsigned long)val;
-}
-
 void sync_mm_rss(struct task_struct *task, struct mm_struct *mm)
 {
 	__sync_task_rss_stat(task, mm);