ext4_debug: add DEBUG_NOPREFIX flag for debug printf

lwext4/ext4_config.h

@@ -98,12 +98,6 @@ extern "C" {
 #define CONFIG_DEBUG_PRINTF 1
 #endif
 
-/**@brief   Debug printf prefixes*/
-#ifndef CONFIG_DEBUG_PREFIX
-#define CONFIG_DEBUG_PREFIX 1
-#endif
-
-
 /**@brief   Assert printf enable (stdout)*/
 #ifndef CONFIG_DEBUG_ASSERT
 #define CONFIG_DEBUG_ASSERT 1

lwext4/ext4_debug.h

@@ -80,6 +80,7 @@ extern "C" {
 #define DEBUG_JBD (1ul << 16)
 #define DEBUG_MBR (1ul << 17)
 
+#define DEBUG_NOPREFIX (1ul << 31)
 #define DEBUG_ALL (0xFFFFFFFF)
 
 static inline const char *ext4_dmask_id2str(uint32_t m)
@@ -145,8 +146,8 @@ uint32_t ext4_dmask_get(void);
 /**@brief   Debug printf.*/
 #define ext4_dbg(m, ...)                                                       \
 	do {                                                                   \
-		if (m & ext4_dmask_get()) {                                    \
+		if ((m) & ext4_dmask_get()) {                                  \
-			if (CONFIG_DEBUG_PREFIX) {                             \
+			if (!((m) & DEBUG_NOPREFIX)) {                         \
 				printf("%s", ext4_dmask_id2str(m));            \
 				printf("l: %d   ", __LINE__);                  \
 			}                                                      \