diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 3ffc3cfa7a14..fc44bfbf785e 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -16,6 +16,7 @@
 #include <linux/writeback.h>
 #include <linux/device.h>
 #include <trace/events/writeback.h>
+#include "internal.h"
 
 struct backing_dev_info noop_backing_dev_info;
 EXPORT_SYMBOL_GPL(noop_backing_dev_info);
@@ -34,8 +35,6 @@ LIST_HEAD(bdi_list);
 /* bdi_wq serves all asynchronous writeback tasks */
 struct workqueue_struct *bdi_wq;
 
-#define K(x) ((x) << (PAGE_SHIFT - 10))
-
 #ifdef CONFIG_DEBUG_FS
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index da9f983a090e..d83f99580900 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1629,7 +1629,6 @@ static void memory_stat_format(struct mem_cgroup *memcg, struct seq_buf *s)
 	WARN_ON_ONCE(seq_buf_has_overflowed(s));
 }
 
-#define K(x) ((x) << (PAGE_SHIFT-10))
 /**
  * mem_cgroup_print_oom_context: Print OOM information relevant to
  * memory controller.
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 612b5597d3af..44bde56ecd02 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -479,8 +479,6 @@ static DECLARE_WAIT_QUEUE_HEAD(oom_victims_wait);
 
 static bool oom_killer_disabled __read_mostly;
 
-#define K(x) ((x) << (PAGE_SHIFT-10))
-
 /*
  * task->mm can be NULL if the task is the exited group leader.  So to
  * determine whether the task is using a particular mm, we examine all the
@@ -994,7 +992,6 @@ static void __oom_kill_process(struct task_struct *victim, const char *message)
 	mmdrop(mm);
 	put_task_struct(victim);
 }
-#undef K
 
 /*
  * Kill provided task unless it's secured by setting