From: NeilBrown <neilb@suse.de>
Date: Mon, 27 Mar 2006 09:18:20 +0000 (-0800)
Subject: [PATCH] md: Convert reconfig_sem to reconfig_mutex
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=df5b89b323b922f56650b4b4d7c41899b937cf19;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[PATCH] md: Convert reconfig_sem to reconfig_mutex

... being careful that mutex_trylock is inverted wrt down_trylock

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/md/md.c b/drivers/md/md.c
index c9c9c096ad80..039e071c1007 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -255,7 +255,7 @@ static mddev_t * mddev_find(dev_t unit)
 	else
 		new->md_minor = MINOR(unit) >> MdpMinorShift;
 
-	init_MUTEX(&new->reconfig_sem);
+	mutex_init(&new->reconfig_mutex);
 	INIT_LIST_HEAD(&new->disks);
 	INIT_LIST_HEAD(&new->all_mddevs);
 	init_timer(&new->safemode_timer);
@@ -277,22 +277,22 @@ static mddev_t * mddev_find(dev_t unit)
 
 static inline int mddev_lock(mddev_t * mddev)
 {
-	return down_interruptible(&mddev->reconfig_sem);
+	return mutex_lock_interruptible(&mddev->reconfig_mutex);
 }
 
 static inline void mddev_lock_uninterruptible(mddev_t * mddev)
 {
-	down(&mddev->reconfig_sem);
+	mutex_lock(&mddev->reconfig_mutex);
 }
 
 static inline int mddev_trylock(mddev_t * mddev)
 {
-	return down_trylock(&mddev->reconfig_sem);
+	return mutex_trylock(&mddev->reconfig_mutex);
 }
 
 static inline void mddev_unlock(mddev_t * mddev)
 {
-	up(&mddev->reconfig_sem);
+	mutex_unlock(&mddev->reconfig_mutex);
 
 	md_wakeup_thread(mddev->thread);
 }
@@ -4893,7 +4893,7 @@ void md_check_recovery(mddev_t *mddev)
 		))
 		return;
 
-	if (mddev_trylock(mddev)==0) {
+	if (mddev_trylock(mddev)) {
 		int spares =0;
 
 		spin_lock_irq(&mddev->write_lock);
@@ -5029,7 +5029,7 @@ static int md_notify_reboot(struct notifier_block *this,
 		printk(KERN_INFO "md: stopping all md devices.\n");
 
 		ITERATE_MDDEV(mddev,tmp)
-			if (mddev_trylock(mddev)==0)
+			if (mddev_trylock(mddev))
 				do_md_stop (mddev, 1);
 		/*
 		 * certain more exotic SCSI devices are known to be
diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
index c0d3097846a7..e2df61f5b09a 100644
--- a/include/linux/raid/md_k.h
+++ b/include/linux/raid/md_k.h
@@ -185,7 +185,7 @@ struct mddev_s
 	unsigned long			recovery;
 
 	int				in_sync;	/* know to not need resync */
-	struct semaphore		reconfig_sem;
+	struct mutex			reconfig_mutex;
 	atomic_t			active;
 
 	int				changed;	/* true if we might need to reread partition info */