suspend_lock doesn't need to be rw
--- diff/drivers/md/dm.c	2005-07-11 20:54:33.000000000 +0100
+++ source/drivers/md/dm.c	2005-07-11 20:54:18.000000000 +0100
@@ -58,7 +58,7 @@
 
 struct mapped_device {
 	struct rw_semaphore io_lock;
-	struct rw_semaphore suspend_lock;
+	struct semaphore suspend_lock;
 	rwlock_t map_lock;
 	atomic_t holders;
 
@@ -748,7 +748,7 @@
 
 	memset(md, 0, sizeof(*md));
 	init_rwsem(&md->io_lock);
-	init_rwsem(&md->suspend_lock);
+	init_MUTEX(&md->suspend_lock);
 	rwlock_init(&md->map_lock);
 	atomic_set(&md->holders, 1);
 	atomic_set(&md->event_nr, 0);
@@ -965,7 +965,7 @@
 {
 	int r = -EINVAL;
 
-	down_write(&md->suspend_lock);
+	down(&md->suspend_lock);
 
 	/* device must be suspended */
 	if (!dm_suspended(md))
@@ -975,7 +975,7 @@
 	r = __bind(md, table);
 
 out:
-	up_write(&md->suspend_lock);
+	up(&md->suspend_lock);
 	return r;
 }
 
@@ -1037,7 +1037,7 @@
 	DECLARE_WAITQUEUE(wait, current);
 	int r = -EINVAL;
 
-	down_write(&md->suspend_lock);
+	down(&md->suspend_lock);
 
 	if (dm_suspended(md))
 		goto out;
@@ -1100,7 +1100,7 @@
 
 out:
 	dm_table_put(map);
-	up_write(&md->suspend_lock);
+	up(&md->suspend_lock);
 	return r;
 }
 
@@ -1110,7 +1110,7 @@
 	struct bio *def;
 	struct dm_table *map = NULL;
 
-	down_write(&md->suspend_lock);
+	down(&md->suspend_lock);
 	if (!dm_suspended(md))
 		goto out;
 
@@ -1137,7 +1137,7 @@
 
 out:
 	dm_table_put(map);
-	up_write(&md->suspend_lock);
+	up(&md->suspend_lock);
 
 	return r;
 }