--- zzzz-none-000/linux-3.10.107/Documentation/s390/s390dbf.txt	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/Documentation/s390/s390dbf.txt	2021-02-04 17:41:59.000000000 +0000
@@ -158,6 +158,16 @@
 Description:   Sets new actual debug level if new_level is valid. 
 
 ---------------------------------------------------------------------------
+bool debug_level_enabled (debug_info_t * id, int level);
+
+Parameter:    id:	  handle for debug log
+	      level:	  debug level
+
+Return Value: True if level is less or equal to the current debug level.
+
+Description:  Returns true if debug events for the specified level would be
+	      logged. Otherwise returns false.
+---------------------------------------------------------------------------
 void debug_stop_all(void);
 
 Parameter:     none