[S390] vmlogrdr: remove BKL

Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/char/vmlogrdr.c

@@ -312,11 +312,9 @@ static int vmlogrdr_open (struct inode *inode, struct file *filp)
 		return -ENOSYS;
 
 	/* Besure this device hasn't already been opened */
-	lock_kernel();
 	spin_lock_bh(&logptr->priv_lock);
 	if (logptr->dev_in_use)	{
 		spin_unlock_bh(&logptr->priv_lock);
-		unlock_kernel();
 		return -EBUSY;
 	}
 	logptr->dev_in_use = 1;
@@ -360,9 +358,8 @@ static int vmlogrdr_open (struct inode *inode, struct file *filp)
 		   || (logptr->iucv_path_severed));
 	if (logptr->iucv_path_severed)
 		goto out_record;
- 	ret = nonseekable_open(inode, filp);
-	unlock_kernel();
-	return ret;
+	nonseekable_open(inode, filp);
+	return 0;
 
 out_record:
 	if (logptr->autorecording)
@@ -372,7 +369,6 @@ static int vmlogrdr_open (struct inode *inode, struct file *filp)
 	logptr->path = NULL;
 out_dev:
 	logptr->dev_in_use = 0;
-	unlock_kernel();
 	return -EIO;
 }