From b6d4b69be8350eaca5837013eec7ed0861ebd620 Mon Sep 17 00:00:00 2001
From: Thomas Schoebel-Theuer <tst@schoebel-theuer.de>
Date: Sat, 25 Feb 2017 17:24:39 +0100
Subject: [PATCH] copy: remove obsolete mutex

---
 kernel/mars_copy.c | 1 -
 kernel/mars_copy.h | 2 --
 2 files changed, 3 deletions(-)

diff --git a/kernel/mars_copy.c b/kernel/mars_copy.c
index a599f92a..6195ad4d 100644
--- a/kernel/mars_copy.c
+++ b/kernel/mars_copy.c
@@ -998,7 +998,6 @@ static int copy_brick_construct(struct copy_brick *brick)
 	}
 
 	init_waitqueue_head(&brick->event);
-	sema_init(&brick->mutex, 1);
 	return 0;
 }
 
diff --git a/kernel/mars_copy.h b/kernel/mars_copy.h
index e238b59f..de0cb7e6 100644
--- a/kernel/mars_copy.h
+++ b/kernel/mars_copy.h
@@ -25,7 +25,6 @@
 #define MARS_COPY_H
 
 #include <linux/wait.h>
-#include <linux/semaphore.h>
 
 #define INPUT_A_IO   0
 #define INPUT_A_COPY 1
@@ -102,7 +101,6 @@ struct copy_brick {
 	atomic_t copy_write_flight;
 	long long last_jiffies;
 	wait_queue_head_t event;
-	struct semaphore mutex;
 	struct task_struct *thread;
 	struct copy_state **st;
 };