diff -Nurp ipw2100-1.2.1/compat.h ipw2100-1.2.1-new/compat.h
--- ipw2100-1.2.1/compat.h	1970-01-01 08:00:00.000000000 +0800
+++ ipw2100-1.2.1-new/compat.h	2006-09-04 13:46:18.000000000 +0800
@@ -0,0 +1,79 @@
+/*
+ * Header file to maintain compatibility among different kernel versions.
+ *
+ * Copyright (c) 2004-2006  Zhu Yi <yi.zhu@intel.com>, Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation. See README and COPYING for
+ * more details.
+ */
+
+#include <linux/version.h>
+
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,15)
+# include <linux/mutex.h>
+#else
+# define mutex semaphore
+# define mutex_init init_MUTEX
+# define mutex_lock down
+# define mutex_unlock up
+#endif
+
+#ifndef IW_QUAL_DBM
+# define IW_QUAL_DBM 0
+#endif
+
+#ifndef ARPHRD_IEEE80211_RADIOTAP
+#define ARPHRD_IEEE80211_RADIOTAP 803  /* IEEE 802.11 + radiotap header */
+#endif
+
+#ifndef __bitwise		/* if __leXX is not defined */
+typedef __u16 __le16;
+typedef __u64 __le64;
+#endif
+
+#if WIRELESS_EXT < 17
+#define IW_QUAL_QUAL_UPDATED    0x01	/* Value was updated since last read */
+#define IW_QUAL_LEVEL_UPDATED   0x02
+#define IW_QUAL_NOISE_UPDATED   0x04
+#define IW_QUAL_ALL_UPDATED     0x07
+#define IW_QUAL_QUAL_INVALID    0x10	/* Driver doesn't provide value */
+#define IW_QUAL_LEVEL_INVALID   0x20
+#define IW_QUAL_NOISE_INVALID   0x40
+#define IW_QUAL_ALL_INVALID     0x70
+#endif
+
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,8)
+#define	__iomem
+#define	__le32		u32
+#endif
+
+#ifndef	NETDEV_TX_OK
+#define	NETDEV_TX_OK		0
+#endif
+
+#ifndef IRQF_SHARED
+#define IRQF_SHARED	SA_SHIRQ
+#endif
+
+#ifndef IW_SCAN_TYPE_ACTIVE
+#define IW_SCAN_TYPE_ACTIVE 0
+#define IW_SCAN_TYPE_PASSIVE 1
+#endif
+
+#if WIRELESS_EXT < 18
+#define IW_AUTH_ALG_OPEN_SYSTEM			0x1
+#define IW_AUTH_ALG_SHARED_KEY			0x2
+#define IW_AUTH_ALG_LEAP			0x4
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,14)
+static inline void *kzalloc(size_t size, unsigned flags)
+{
+	void *ret = kmalloc(size, flags);
+	if (ret)
+		memset(ret, 0, size);
+	return ret;
+}
+#endif
diff -Nurp ipw2100-1.2.1/ipw2100.h ipw2100-1.2.1-new/ipw2100.h
--- ipw2100-1.2.1/ipw2100.h	2006-02-22 02:46:17.000000000 +0800
+++ ipw2100-1.2.1-new/ipw2100.h	2006-09-04 13:46:18.000000000 +0800
@@ -39,6 +39,7 @@
 #include <linux/wireless.h>
 #include <net/iw_handler.h>	// new driver API
 
+#include "compat.h"
 #include <net/ieee80211.h>
 
 #ifdef CONFIG_IPW2100_MONITOR
diff -Nurp ipw2100-1.2.1/Makefile ipw2100-1.2.1-new/Makefile
--- ipw2100-1.2.1/Makefile	2006-02-22 02:46:16.000000000 +0800
+++ ipw2100-1.2.1-new/Makefile	2006-09-04 11:12:15.000000000 +0800
@@ -125,7 +125,7 @@ check_inc:
 
 clean:
 	rm -f *.mod.c *.mod *.o *.ko .*.cmd .*.flags .lst *.lst
-	rm -rf $(PWD)/tmp
+	rm -rf $(PWD)/tmp Modules.symvers Module.symvers
 	for file in *.{c,h}; do \
 		sed -i -e "s:\ *$$::g" -e "s:\t*$$::g" $$file; \
 	done
@@ -139,6 +139,7 @@ MODVERDIR=$(TMP)/.tmp_versions
 modules:
 	mkdir -p $(MODVERDIR)
 	-cp $(IEEE80211_MODVERDIR)/*.mod $(MODVERDIR)
+	-cp $(IEEE80211_MODVERDIR)/../Modules.symvers $(PWD)
 ifdef ($(KSRC_OUTPUT)/.tmp_versions)
 	-cp $(KSRC_OUTPUT)/.tmp_versions/*.mod $(MODVERDIR)
 endif