1 files changed, 4 insertions, 7 deletions

diff --git a/drivers/s390/char/vmlogrdr.c b/drivers/s390/char/vmlogrdr.c
index d1a142fa3eb4..e40a1b892866 100644
--- a/drivers/s390/char/vmlogrdr.c
+++ b/drivers/s390/char/vmlogrdr.c
@@ -16,6 +16,7 @@
 
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/slab.h>
 #include <linux/errno.h>
 #include <linux/types.h>
 #include <linux/interrupt.h>
@@ -312,11 +313,9 @@ 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 +359,8 @@ 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 +370,6 @@ out_path:
         logptr->path = NULL;
 out_dev:
         logptr->dev_in_use = 0;
-        unlock_kernel();
         return -EIO;
 }
 
@@ -679,7 +676,7 @@ static int vmlogrdr_pm_prepare(struct device *dev)
 }
 
 
-static struct dev_pm_ops vmlogrdr_pm_ops = {
+static const struct dev_pm_ops vmlogrdr_pm_ops = {
         .prepare = vmlogrdr_pm_prepare,
 };