diff --git a/mm/mmap.c b/mm/mmap.c
index bb2a7e097c7d32d4b86372727005d296335ba72c..5f2b2b184c604b203f38142d8e638db87487f5f4 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -3063,9 +3063,7 @@ void exit_mmap(struct mm_struct *mm)
 		 * which clears VM_LOCKED, otherwise the oom reaper cannot
 		 * reliably test it.
 		 */
-		mutex_lock(&oom_lock);
 		(void)__oom_reap_task_mm(mm);
-		mutex_unlock(&oom_lock);
 
 		set_bit(MMF_OOM_SKIP, &mm->flags);
 		down_write(&mm->mmap_sem);
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index be31a1e0fe78ff23319441d71ad92d3744972f78..66a86dd049a0670e31e6c7a508c245115da100cc 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -535,28 +535,9 @@ bool __oom_reap_task_mm(struct mm_struct *mm)
 
 static bool oom_reap_task_mm(struct task_struct *tsk, struct mm_struct *mm)
 {
-	bool ret = true;
-
-	/*
-	 * We have to make sure to not race with the victim exit path
-	 * and cause premature new oom victim selection:
-	 * oom_reap_task_mm		exit_mm
-	 *   mmget_not_zero
-	 *				  mmput
-	 *				    atomic_dec_and_test
-	 *				  exit_oom_victim
-	 *				[...]
-	 *				out_of_memory
-	 *				  select_bad_process
-	 *				    # no TIF_MEMDIE task selects new victim
-	 *  unmap_page_range # frees some memory
-	 */
-	mutex_lock(&oom_lock);
-
 	if (!down_read_trylock(&mm->mmap_sem)) {
-		ret = false;
 		trace_skip_task_reaping(tsk->pid);
-		goto unlock_oom;
+		return false;
 	}
 
 	/*
@@ -568,7 +549,7 @@ static bool oom_reap_task_mm(struct task_struct *tsk, struct mm_struct *mm)
 	if (test_bit(MMF_OOM_SKIP, &mm->flags)) {
 		up_read(&mm->mmap_sem);
 		trace_skip_task_reaping(tsk->pid);
-		goto unlock_oom;
+		return true;
 	}
 
 	trace_start_task_reaping(tsk->pid);
@@ -576,8 +557,7 @@ static bool oom_reap_task_mm(struct task_struct *tsk, struct mm_struct *mm)
 	/* failed to reap part of the address space. Try again later */
 	if (!__oom_reap_task_mm(mm)) {
 		up_read(&mm->mmap_sem);
-		ret = false;
-		goto unlock_oom;
+		return false;
 	}
 
 	pr_info("oom_reaper: reaped process %d (%s), now anon-rss:%lukB, file-rss:%lukB, shmem-rss:%lukB\n",
@@ -588,9 +568,7 @@ static bool oom_reap_task_mm(struct task_struct *tsk, struct mm_struct *mm)
 	up_read(&mm->mmap_sem);
 
 	trace_finish_task_reaping(tsk->pid);
-unlock_oom:
-	mutex_unlock(&oom_lock);
-	return ret;
+	return true;
 }
 
 #define MAX_OOM_REAP_RETRIES 10