Dynamic debug: fix pr_fmt() build error

When CONFIG_DYNAMIC_DEBUG is enabled, allow callers of pr_debug()
to provide their own definition of pr_fmt() even if that definition
uses tricks like

#define pr_fmt(fmt) "%s:" fmt, __func__
Signed-off-by: Greg Banks <gnb@sgi.com>
Cc: Jason Baron <jbaron@redhat.com>
Acked-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

include/linux/dynamic_debug.h

@@ -57,7 +57,7 @@ extern int ddebug_remove_module(char *mod_name);
 	{ KBUILD_MODNAME, __func__, __FILE__, fmt, DEBUG_HASH,	\
 		DEBUG_HASH2, __LINE__, _DPRINTK_FLAGS_DEFAULT };	\
 	if (__dynamic_dbg_enabled(descriptor))				\
-		printk(KERN_DEBUG KBUILD_MODNAME ":" fmt,		\
+		printk(KERN_DEBUG KBUILD_MODNAME ":" pr_fmt(fmt),	\
 				##__VA_ARGS__);				\
 	} while (0)
 
@@ -70,7 +70,7 @@ extern int ddebug_remove_module(char *mod_name);
 		DEBUG_HASH2, __LINE__, _DPRINTK_FLAGS_DEFAULT };	\
 	if (__dynamic_dbg_enabled(descriptor))				\
 			dev_printk(KERN_DEBUG, dev,			\
-					KBUILD_MODNAME ": " fmt,	\
+					KBUILD_MODNAME ": " pr_fmt(fmt),\
 					##__VA_ARGS__);			\
 	} while (0)
 

include/linux/kernel.h

@@ -359,8 +359,9 @@ static inline char *pack_hex_byte(char *buf, u8 byte)
 #define pr_debug(fmt, ...) \
 	printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
 #elif defined(CONFIG_DYNAMIC_DEBUG)
+/* dynamic_pr_debug() uses pr_fmt() internally so we don't need it here */
 #define pr_debug(fmt, ...) do { \
-	dynamic_pr_debug(pr_fmt(fmt), ##__VA_ARGS__); \
+	dynamic_pr_debug(fmt, ##__VA_ARGS__); \
 	} while (0)
 #else
 #define pr_debug(fmt, ...) \