2 files changed, 11 insertions, 8 deletions

diff --git a/drivers/s390/net/smsgiucv.c b/drivers/s390/net/smsgiucv.c
index 67f2485d2372..3e666b6e77b4 100644
--- a/drivers/s390/net/smsgiucv.c
+++ b/drivers/s390/net/smsgiucv.c
@@ -31,9 +31,9 @@
 
 struct smsg_callback {
         struct list_head list;
-        char *prefix;
+        const char *prefix;
         int len;
-        void (*callback)(char *from, char *str);
+        void (*callback)(const char *from, char *str);
 };
 
 MODULE_AUTHOR
@@ -100,8 +100,8 @@ static void smsg_message_pending(struct iucv_path *path,
         kfree(buffer);
 }
 
-int smsg_register_callback(char *prefix,
-                           void (*callback)(char *from, char *str))
+int smsg_register_callback(const char *prefix,
+                           void (*callback)(const char *from, char *str))
 {
         struct smsg_callback *cb;
 
@@ -117,8 +117,9 @@ int smsg_register_callback(char *prefix,
         return 0;
 }
 
-void smsg_unregister_callback(char *prefix,
-                              void (*callback)(char *from, char *str))
+void smsg_unregister_callback(const char *prefix,
+                              void (*callback)(const char *from,
+                                               char *str))
 {
         struct smsg_callback *cb, *tmp;
 
diff --git a/drivers/s390/net/smsgiucv.h b/drivers/s390/net/smsgiucv.h
index 67f5d4f8378d..9410b45fde03 100644
--- a/drivers/s390/net/smsgiucv.h
+++ b/drivers/s390/net/smsgiucv.h
@@ -5,6 +5,8 @@
  * Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
  */
 
-int  smsg_register_callback(char *, void (*)(char *, char *));
-void smsg_unregister_callback(char *, void (*)(char *, char *));
+int  smsg_register_callback(const char *,
+                            void (*)(const char *, char *));
+void smsg_unregister_callback(const char *,
+                              void (*)(const char *, char *));