1 files changed, 0 insertions, 20 deletions

diff --git a/include/linux/ksm.h b/include/linux/ksm.h
index 0e26de6adb51..a485c14ecd5d 100644
--- a/include/linux/ksm.h
+++ b/include/linux/ksm.h
@@ -12,8 +12,6 @@
 #include <linux/sched.h>
 #include <linux/vmstat.h>
 
-struct mmu_gather;
-
 #ifdef CONFIG_KSM
 int ksm_madvise(struct vm_area_struct *vma, unsigned long start,
                 unsigned long end, int advice, unsigned long *vm_flags);
@@ -27,19 +25,6 @@ static inline int ksm_fork(struct mm_struct *mm, struct mm_struct *oldmm)
         return 0;
 }
 
-/*
- * For KSM to handle OOM without deadlock when it's breaking COW in a
- * likely victim of the OOM killer, exit_mmap() has to serialize with
- * ksm_exit() after freeing mm's pages but before freeing its page tables.
- * That leaves a window in which KSM might refault pages which have just
- * been finally unmapped: guard against that with ksm_test_exit(), and
- * use it after getting mmap_sem in ksm.c, to check if mm is exiting.
- */
-static inline bool ksm_test_exit(struct mm_struct *mm)
-{
-        return atomic_read(&mm->mm_users) == 0;
-}
-
 static inline void ksm_exit(struct mm_struct *mm)
 {
         if (test_bit(MMF_VM_MERGEABLE, &mm->flags))
@@ -79,11 +64,6 @@ static inline int ksm_fork(struct mm_struct *mm, struct mm_struct *oldmm)
         return 0;
 }
 
-static inline bool ksm_test_exit(struct mm_struct *mm)
-{
-        return 0;
-}
-
 static inline void ksm_exit(struct mm_struct *mm)
 {
 }