diff --git a/include/usb/lin_gadget_compat.h b/include/usb/lin_gadget_compat.h
index 9b31511..fce3be7 100644
--- a/include/usb/lin_gadget_compat.h
+++ b/include/usb/lin_gadget_compat.h
@@ -26,7 +26,7 @@
 /* common */
 #define spin_lock_init(...)
 #define spin_lock(...)
-#define spin_lock_irqsave(lock, flags) do {flags = 1; } while (0)
+#define spin_lock_irqsave(lock, flags) do { debug("%lu\n", flags); } while (0)
 #define spin_unlock(...)
 #define spin_unlock_irqrestore(lock, flags) do {flags = 0; } while (0)
 #define disable_irq(...)
diff --git a/include/usb/s3c_udc.h b/include/usb/s3c_udc.h
index 14dadc8..31d8f6c 100644
--- a/include/usb/s3c_udc.h
+++ b/include/usb/s3c_udc.h
@@ -131,16 +131,10 @@
 #define DEBUG_EP0(fmt, args...) do {} while (0)
 #endif
 
-#ifdef DEBUG_S3C_UDC
-#define DEBUG(fmt, args...) printk(fmt, ##args)
-#else
-#define DEBUG(fmt, args...) do {} while (0)
-#endif
-
 #ifdef DEBUG_S3C_UDC_ISR
-#define DEBUG_ISR(fmt, args...) printk(fmt, ##args)
+#define DEBUG_ISR	1
 #else
-#define DEBUG_ISR(fmt, args...) do {} while (0)
+#define DEBUG_ISR	0
 #endif
 
 #ifdef DEBUG_S3C_UDC_OUT_EP
@@ -150,9 +144,15 @@
 #endif
 
 #ifdef DEBUG_S3C_UDC_IN_EP
-#define DEBUG_IN_EP(fmt, args...) printk(fmt, ##args)
+#define DEBUG_IN_EP	1
 #else
-#define DEBUG_IN_EP(fmt, args...) do {} while (0)
+#define DEBUG_IN_EP	0
+#endif
+
+#if defined(DEBUG_S3C_UDC_SETUP) || defined(DEBUG_S3C_UDC_EP0) || \
+	defined(DEBUG_S3C_UDC_ISR) || defined(DEBUG_S3C_UDC_OUT_EP) || \
+	defined(DEBUG_S3C_UDC_IN_EP) || defined(DEBUG_S3C_UDC)
+#define DEBUG
 #endif
 
 #define ERR(stuff...)		printf("ERR udc: " stuff)