aha152x.c in 2.5.41 needs this to compile:
diff -ru linux.orig/drivers/scsi/aha152x.c linux.mce/drivers/scsi/aha152x.c
--- linux.orig/drivers/scsi/aha152x.c Tue Oct 8 00:08:45 2002
+++ linux.mce/drivers/scsi/aha152x.c Tue Oct 8 00:06:13 2002
@@ -250,6 +250,7 @@
#include "aha152x.h"
#include <linux/stat.h>
+#include <linux/workqueue.h>
#include <scsi/scsicam.h>
MCE