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diff --git a/drivers/usb/storage/debug.h b/drivers/usb/storage/debug.h
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+/* Driver for USB Mass Storage compliant devices
+ * Debugging Functions Header File
+ *
+ * Current development and maintenance by:
+ *   (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
+ *
+ * Initial work by:
+ *   (c) 1999 Michael Gee (michael@linuxspecific.com)
+ *
+ * This driver is based on the 'USB Mass Storage Class' document. This
+ * describes in detail the protocol used to communicate with such
+ * devices.  Clearly, the designers had SCSI and ATAPI commands in
+ * mind when they created this document.  The commands are all very
+ * similar to commands in the SCSI-II and ATAPI specifications.
+ *
+ * It is important to note that in a number of cases this class
+ * exhibits class-specific exemptions from the USB specification.
+ * Notably the usage of NAK, STALL and ACK differs from the norm, in
+ * that they are used to communicate wait, failed and OK on commands.
+ *
+ * Also, for certain devices, the interrupt endpoint is used to convey
+ * status of a command.
+ *
+ * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more
+ * information about this driver.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef _DEBUG_H_
+#define _DEBUG_H_
+
+#include <linux/kernel.h>
+
+#define USB_STORAGE "usb-storage: "
+
+#ifdef CONFIG_USB_STORAGE_DEBUG
+extern bool usb_storage_debug;
+
+void usb_stor_show_command(const struct us_data *us, struct scsi_cmnd *srb);
+void usb_stor_show_sense(const struct us_data *us, unsigned char key,
+			 unsigned char asc, unsigned char ascq);
+__printf(2, 3) int usb_stor_dbg(const struct us_data *us,
+				const char *fmt, ...);
+
+#define US_DEBUGPX(fmt, ...)	                \
+    do { if (usb_storage_debug) printk(fmt, ##__VA_ARGS__); } while (0)
+#define US_DEBUG(x)		                        \
+    do { if (usb_storage_debug) x; } while (0)
+#else
+__printf(2, 3)
+static inline int _usb_stor_dbg(const struct us_data *us,
+				const char *fmt, ...) {return 1;}
+#define usb_stor_dbg(us, fmt, ...)				\
+	do { if (0) _usb_stor_dbg(us, fmt, ##__VA_ARGS__); } while (0)
+#define US_DEBUGPX(fmt, ...)					\
+	do { if (0) printk(fmt, ##__VA_ARGS__); } while (0)
+#define US_DEBUG(x)
+#endif
+
+#endif