claw/lcs/netiucv: check s390dbf level before sprints

additional check of s390dbf level results in better performance
if the default low debugging level is active.

Signed-off-by: Peter Tiedemann <[e-mail]>
Signed-off-by: Ursula Braun <[e-mail]>
Signed-off-by: Jeff Garzik <[e-mail]>

drivers/s390/net/claw.h

···
 	debug_event(claw_dbf_##name,level,(void*)(addr),len); \
 } while (0)
 
+/* Allow to sort out low debug levels early to avoid wasted sprints */
+static inline int claw_dbf_passes(debug_info_t *dbf_grp, int level)
+{
+	return (level <= dbf_grp->level);
+}
+
 #define CLAW_DBF_TEXT_(level,name,text...) \
-do {                                       \
-	sprintf(debug_buffer, text);  \
-		debug_text_event(claw_dbf_##name,level, debug_buffer);\
-} while (0)
+	do { \
+		if (claw_dbf_passes(claw_dbf_##name, level)) { \
+			sprintf(debug_buffer, text); \
+			debug_text_event(claw_dbf_##name, level, \
+						debug_buffer); \
+		} \
+	} while (0)
 
 /*******************************************************
 *  Define Control Blocks                               *

drivers/s390/net/lcs.h

···
 	debug_event(lcs_dbf_##name,level,(void*)(addr),len); \
 } while (0)
 
+/* Allow to sort out low debug levels early to avoid wasted sprints */
+static inline int lcs_dbf_passes(debug_info_t *dbf_grp, int level)
+{
+	return (level <= dbf_grp->level);
+}
+
 #define LCS_DBF_TEXT_(level,name,text...) \
-do {                                       \
-	sprintf(debug_buffer, text);  \
-		debug_text_event(lcs_dbf_##name,level, debug_buffer);\
-} while (0)
+	do { \
+		if (lcs_dbf_passes(lcs_dbf_##name, level)) { \
+			sprintf(debug_buffer, text); \
+			debug_text_event(lcs_dbf_##name, level, debug_buffer); \
+		} \
+	} while (0)
 
 /**
  *	sysfs related stuff

drivers/s390/net/netiucv.c

···
 
 DECLARE_PER_CPU(char[256], iucv_dbf_txt_buf);
 
-#define IUCV_DBF_TEXT_(name,level,text...)				\
-	do {								\
-		char* iucv_dbf_txt_buf = get_cpu_var(iucv_dbf_txt_buf);	\
-		sprintf(iucv_dbf_txt_buf, text);			\
-		debug_text_event(iucv_dbf_##name,level,iucv_dbf_txt_buf); \
-		put_cpu_var(iucv_dbf_txt_buf);				\
+/* Allow to sort out low debug levels early to avoid wasted sprints */
+static inline int iucv_dbf_passes(debug_info_t *dbf_grp, int level)
+{
+	return (level <= dbf_grp->level);
+}
+
+#define IUCV_DBF_TEXT_(name, level, text...) \
+	do { \
+		if (iucv_dbf_passes(iucv_dbf_##name, level)) { \
+			char* iucv_dbf_txt_buf = \
+					get_cpu_var(iucv_dbf_txt_buf); \
+			sprintf(iucv_dbf_txt_buf, text); \
+			debug_text_event(iucv_dbf_##name, level, \
+						iucv_dbf_txt_buf); \
+			put_cpu_var(iucv_dbf_txt_buf); \
+		} \
 	} while (0)
 
 #define IUCV_DBF_SPRINTF(name,level,text...) \