[PATCH] remove (start|end)_lazy_tlb()

Patch from William Lee Irwin III <wli@holomorphy.com>

Remove start_lazy_tlb() and end_lazy_tlb(), as they are unused.

include/linux/sched.h

@@ -591,9 +591,6 @@ static inline int capable(int cap)
  */
 extern struct mm_struct * mm_alloc(void);
 
-extern struct mm_struct * start_lazy_tlb(void);
-extern void end_lazy_tlb(struct mm_struct *mm);
-
 /* mmdrop drops the mm and the page tables */
 extern inline void FASTCALL(__mmdrop(struct mm_struct *));
 static inline void mmdrop(struct mm_struct * mm)

kernel/exit.c

@@ -434,33 +434,6 @@ void exit_fs(struct task_struct *tsk)
 	__exit_fs(tsk);
 }
 
-/*
- * We can use these to temporarily drop into
- * "lazy TLB" mode and back.
- */
-struct mm_struct * start_lazy_tlb(void)
-{
-	struct mm_struct *mm = current->mm;
-	current->mm = NULL;
-	/* active_mm is still 'mm' */
-	atomic_inc(&mm->mm_count);
-	enter_lazy_tlb(mm, current, smp_processor_id());
-	return mm;
-}
-
-void end_lazy_tlb(struct mm_struct *mm)
-{
-	struct mm_struct *active_mm = current->active_mm;
-
-	current->mm = mm;
-	if (mm != active_mm) {
-		current->active_mm = mm;
-		activate_mm(active_mm, mm);
-	}
-	mmdrop(active_mm);
-}
-
-
 /*
  * Turn us into a lazy TLB process if we
  * aren't already..