net: l2tp: Standardize logging styles

Use more current logging styles.

Add pr_fmt to prefix output appropriately.
Convert printks to pr_<level>.
Convert PRINTK macros to new l2tp_<level> macros.
Neaten some <foo>_refcount debugging macros.
Use print_hex_dump_bytes instead of hand-coded loops.
Coalesce formats and align arguments.

Some KERN_DEBUG output is not now emitted unless
dynamic_debugging is enabled.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/l2tp/l2tp_core.h b/net/l2tp/l2tp_core.h
index 9002634..a38ec6c 100644
--- a/net/l2tp/l2tp_core.h
+++ b/net/l2tp/l2tp_core.h
@@ -261,17 +261,36 @@
 }
 
 #ifdef L2TP_REFCNT_DEBUG
-#define l2tp_session_inc_refcount(_s) do { \
-		printk(KERN_DEBUG "l2tp_session_inc_refcount: %s:%d %s: cnt=%d\n", __func__, __LINE__, (_s)->name, atomic_read(&_s->ref_count)); \
-		l2tp_session_inc_refcount_1(_s);				\
-	} while (0)
-#define l2tp_session_dec_refcount(_s) do { \
-		printk(KERN_DEBUG "l2tp_session_dec_refcount: %s:%d %s: cnt=%d\n", __func__, __LINE__, (_s)->name, atomic_read(&_s->ref_count)); \
-		l2tp_session_dec_refcount_1(_s);				\
-	} while (0)
+#define l2tp_session_inc_refcount(_s)					\
+do {									\
+	pr_debug("l2tp_session_inc_refcount: %s:%d %s: cnt=%d\n",	\
+		 __func__, __LINE__, (_s)->name,			\
+		 atomic_read(&_s->ref_count));				\
+	l2tp_session_inc_refcount_1(_s);				\
+} while (0)
+#define l2tp_session_dec_refcount(_s)					\
+do {									\
+	pr_debug("l2tp_session_dec_refcount: %s:%d %s: cnt=%d\n",	\
+		 __func__, __LINE__, (_s)->name,			\
+		 atomic_read(&_s->ref_count));				\
+	l2tp_session_dec_refcount_1(_s);				\
+} while (0)
 #else
 #define l2tp_session_inc_refcount(s) l2tp_session_inc_refcount_1(s)
 #define l2tp_session_dec_refcount(s) l2tp_session_dec_refcount_1(s)
 #endif
 
+#define l2tp_printk(ptr, type, func, fmt, ...)				\
+do {									\
+	if (((ptr)->debug) & (type))					\
+		func(fmt, ##__VA_ARGS__);				\
+} while (0)
+
+#define l2tp_warn(ptr, type, fmt, ...)					\
+	l2tp_printk(ptr, type, pr_warn, fmt, ##__VA_ARGS__)
+#define l2tp_info(ptr, type, fmt, ...)					\
+	l2tp_printk(ptr, type, pr_info, fmt, ##__VA_ARGS__)
+#define l2tp_dbg(ptr, type, fmt, ...)					\
+	l2tp_printk(ptr, type, pr_debug, fmt, ##__VA_ARGS__)
+
 #endif /* _L2TP_CORE_H_ */