s390/s390dbf: add debug_level_enabled() function

Add the debug_level_enabled() function to check if debug events for a particular level would be logged. This might help to save cycles for debug events that require additional information collection. Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

s390/s390dbf: add debug_level_enabled() function
Add the debug_level_enabled() function to check if debug events for a particular level would be logged. This might help to save cycles for debug events that require additional information collection. Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Hendrik Brueckner · Martin Schwidefsky
1 parent 4ae803253e
Showing 2 changed files with 15 additions and 0 deletions Side-by-side Diff
Documentation/s390/s390dbf.txt
arch/s390/include/asm/debug.h
@@ -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
@@ -107,6 +107,11 @@
 void debug_set_critical(void);
 void debug_stop_all(void);
  
+static inline bool debug_level_enabled(debug_info_t* id, int level)
+{
+	return level <= id->level;
+}
+
 static inline debug_entry_t*
 debug_event(debug_info_t* id, int level, void* data, int length)
 {
...	...	@@ -158,6 +158,16 @@
158	158	Description: Sets new actual debug level if new_level is valid.
159	159
160	160	---------------------------------------------------------------------------
	161	+bool debug_level_enabled (debug_info_t * id, int level);
	162	+
	163	+Parameter: id: handle for debug log
	164	+ level: debug level
	165	+
	166	+Return Value: True if level is less or equal to the current debug level.
	167	+
	168	+Description: Returns true if debug events for the specified level would be
	169	+ logged. Otherwise returns false.
	170	+---------------------------------------------------------------------------
161	171	void debug_stop_all(void);
162	172
163	173	Parameter: none
...	...	@@ -107,6 +107,11 @@
107	107	void debug_set_critical(void);
108	108	void debug_stop_all(void);
109	109
	110	+static inline bool debug_level_enabled(debug_info_t* id, int level)
	111	+{
	112	+ return level <= id->level;
	113	+}
	114	+
110	115	static inline debug_entry_t*
111	116	debug_event(debug_info_t* id, int level, void* data, int length)
112	117	{