[SCSI] remove the scsi_request interface from the gdth driver

Initial pass at converting the gdth driver away from the scsi_request
interface so that the request interface can be removed post 2.6.18
without breaking gdth.  Based on changes from Christoph Hellwig
<hch@lst.de>

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/gdth_kcompat.h b/drivers/scsi/gdth_kcompat.h
index e6cf0ed..2a302ee 100644
--- a/drivers/scsi/gdth_kcompat.h
+++ b/drivers/scsi/gdth_kcompat.h
@@ -1,5 +1,3 @@
-
-
 #ifndef IRQ_HANDLED
 typedef void irqreturn_t;
 #define IRQ_NONE
@@ -10,6 +8,18 @@
 #define MODULE_LICENSE(x)
 #endif
 
+#ifndef __iomem
+#define __iomem
+#endif
+
+#ifndef __attribute_used__
+#define __attribute_used__	__devinitdata
+#endif
+
+#ifndef __user
+#define __user
+#endif
+
 #ifndef SERVICE_ACTION_IN
 #define SERVICE_ACTION_IN	0x9e
 #endif