rtlwifi: add CONFIG_RTLWIFI_DEBUG to remove all of the debug logging code

It does seem odd though to have a DBG_EMERG and not always
emit it.

What might also be useful for any embedded use is to add
CONFIG_RTLWIFI_DEBUG to conditionally remove all of the
debug logging code to reduce the largish object size.

This reduces the object size by about 1/3 (250KB)
when CONFIG_RTLWIFI_DEBUG is not set.

$ size drivers/net/wireless/rtlwifi/built-in.o*
   text	   data	    bss	    dec	    hex	filename
 368722	  55333	  94224	 518279	  7e887	drivers/net/wireless/rtlwifi/built-in.o.new
 586904	  55333	 127216	 769453	  bbdad	drivers/net/wireless/rtlwifi/built-in.o.old

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 39 insertions, 0 deletions

diff --git a/drivers/net/wireless/rtlwifi/Kconfig b/drivers/net/wireless/rtlwifi/Kconfig
index d6c42e69bdbd..44b9c0a57702 100644
--- a/drivers/net/wireless/rtlwifi/Kconfig
+++ b/drivers/net/wireless/rtlwifi/Kconfig
@@ -49,6 +49,11 @@ config RTLWIFI
         depends on RTL8192CE || RTL8192CU || RTL8192SE || RTL8192DE
         default m
 
+config RTLWIFI_DEBUG
+        tristate "Additional debugging output"
+        depends on RTL8192CE || RTL8192CU || RTL8192SE || RTL8192DE
+        default y
+
 config RTL8192C_COMMON
         tristate
         depends on RTL8192CE || RTL8192CU
diff --git a/drivers/net/wireless/rtlwifi/debug.h b/drivers/net/wireless/rtlwifi/debug.h
index b024c23b6523..fd5600c69428 100644
--- a/drivers/net/wireless/rtlwifi/debug.h
+++ b/drivers/net/wireless/rtlwifi/debug.h
@@ -156,6 +156,8 @@ enum dbgp_flag_e {
         DBGP_TYPE_MAX
 };
 
+#ifdef CONFIG_RTLWIFI_DEBUG
+
 #define RT_ASSERT(_exp, fmt, ...)                                       \
 do {                                                                    \
         if (!(_exp)) {                                                  \
@@ -195,5 +197,37 @@ do {									\
         }                                                               \
 } while (0)
 
+#else
+
+struct rtl_priv;
+
+__printf(2, 3)
+static inline void RT_ASSERT(int exp, const char *fmt, ...)
+{
+}
+
+__printf(4, 5)
+static inline void RT_TRACE(struct rtl_priv *rtlpriv,
+                            int comp, int level,
+                            const char *fmt, ...)
+{
+}
+
+__printf(4, 5)
+static inline void RTPRINT(struct rtl_priv *rtlpriv,
+                           int dbgtype, int dbgflag,
+                           const char *fmt, ...)
+{
+}
+
+static inline void RT_PRINT_DATA(struct rtl_priv *rtlpriv,
+                                 int comp, int level,
+                                 const char *titlestring,
+                                 const void *hexdata, size_t hexdatalen)
+{
+}
+
+#endif
+
 void rtl_dbgp_flag_init(struct ieee80211_hw *hw);
 #endif