[PATCH 5/8] mm,oom: Remove unused signal_struct->oom_victims.

[Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>]

>From e2e22cd0c0c486d1aef01232fcc62b00fb01709f Mon Sep 17 00:00:00 2001
From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Date: Sat, 2 Jul 2016 23:02:19 +0900
Subject: [PATCH 5/8] mm,oom: Remove unused signal_struct->oom_victims.

Since OOM_SCAN_ABORT case was removed, we no longer need to use
signal_struct->oom_victims useless. Remove it.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
---
 include/linux/sched.h | 1 -
 mm/oom_kill.c         | 2 --
 2 files changed, 3 deletions(-)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 553af29..f472f27 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -671,7 +671,6 @@ struct signal_struct {
 	atomic_t		sigcnt;
 	atomic_t		live;
 	int			nr_threads;
-	atomic_t oom_victims; /* # of TIF_MEDIE threads in this thread group */
 	struct list_head	thread_head;
 
 	wait_queue_head_t	wait_chldexit;	/* for wait4() */
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 734378a..55e0ffb 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -659,7 +659,6 @@ void mark_oom_victim(struct task_struct *tsk, struct oom_control *oc)
 	/* OOM killer might race with memcg OOM */
 	if (test_and_set_tsk_thread_flag(tsk, TIF_MEMDIE))
 		return;
-	atomic_inc(&tsk->signal->oom_victims);
 	/*
 	 * Since mark_oom_victim() is called from multiple threads,
 	 * connect this mm to oom_mm_list only if not yet connected.
@@ -693,7 +692,6 @@ void exit_oom_victim(struct task_struct *tsk)
 {
 	if (!test_and_clear_tsk_thread_flag(tsk, TIF_MEMDIE))
 		return;
-	atomic_dec(&tsk->signal->oom_victims);
 
 	if (!atomic_dec_return(&oom_victims))
 		wake_up_all(&oom_victims_wait);
-- 
1.8.3.1

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