diff -urN truecrypt-4.2a/Linux/build.sh truecrypt-4.2a-new/Linux/build.sh
--- truecrypt-4.2a/Linux/build.sh	2006-06-24 21:13:18 +0700
+++ truecrypt-4.2a-new/Linux/build.sh	2007-03-14 11:18:54 +0700
@@ -38,7 +38,7 @@
 esac
 [ "$V" ] && error "TrueCrypt requires Linux kernel 2.6.5 or later" && exit 1
 
-KERNEL_SRC=/usr/src/linux-source-$(uname -r)
+KERNEL_SRC=/lib/modules/$(uname -r)/source
 check_kernel_version "$KERNEL_SRC" || KERNEL_SRC=/usr/src/linux-source-$(uname -r | cut -d'-' -f1)
 check_kernel_version "$KERNEL_SRC" || KERNEL_SRC=/usr/src/linux-$(uname -r)
 check_kernel_version "$KERNEL_SRC" || KERNEL_SRC=/usr/src/linux-$(uname -r | cut -d'-' -f1)
diff -urN truecrypt-4.2a/Linux/Kernel/Dm-target.c truecrypt-4.2a-new/Linux/Kernel/Dm-target.c
--- truecrypt-4.2a/Linux/Kernel/Dm-target.c	2006-06-28 17:36:28 +0700
+++ truecrypt-4.2a-new/Linux/Kernel/Dm-target.c	2007-03-14 11:08:22 +0700
@@ -26,9 +26,14 @@
 #error Linux kernel 2.6.5 or later required
 #endif
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,18)
+#define DM_MSG_PREFIX "truecrypt"
+#endif
+
 int trace_level = 0;
 
 #define MSG_PREFIX "truecrypt: "
+#define DM_MSG_PREFIX MSG_PREFIX
 #define error(fmt, args...) printk(KERN_ERR MSG_PREFIX fmt, ## args)
 #define trace(level, fmt, args...) level <= trace_level && printk(KERN_DEBUG MSG_PREFIX fmt, ## args)
 #define dbg(fmt, args...) printk(KERN_DEBUG MSG_PREFIX fmt, ## args)
@@ -124,8 +129,13 @@
 		if (p)
 			return p;
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
+		trace (3, "congestion_wait\n");
+		congestion_wait (direction, HZ / 50);
+#else
 		trace (3, "blk_congestion_wait\n");
 		blk_congestion_wait (direction, HZ / 50);
+#endif
 	}
 }
 
@@ -373,9 +383,16 @@
 }
 
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
+static void work_process (struct work_struct *work)
+{
+	struct bio_ctx *bc = container_of(work, struct bio_ctx, work);
+	void *qdata = (void *)bc;
+#else
 static void work_process (void *qdata)
 {
 	struct bio_ctx *bc = (struct bio_ctx *) qdata;
+#endif
 	struct target_ctx *tc = (struct target_ctx *) bc->target->private;
 	struct bio_vec *bv;
 	u64 sec_no = bc->crypto_sector;
@@ -431,7 +448,11 @@
 		bio_put (bio);
 
 		// Queue decryption to leave completion interrupt ASAP
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
+		INIT_WORK (&bc->work, work_process);
+#else
 		INIT_WORK (&bc->work, work_process, bc);
+#endif
 		trace (3, "queue_work (%p)\n", work_queue);
 		queue_work (work_queue, &bc->work);
 		return error;
@@ -496,8 +517,13 @@
 	trace (3, "bio_alloc (%hd)\n", bio_segments (bio));
 	while (!(bion = bio_alloc (GFP_NOIO | __GFP_NOMEMALLOC, bio_segments (bio))))
 	{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
+		trace (3, "congestion_wait\n");
+		congestion_wait (bio_data_dir (bio), HZ / 50);
+#else
 		trace (3, "blk_congestion_wait\n");
 		blk_congestion_wait (bio_data_dir (bio), HZ / 50);
+#endif
 	}
 
 	bion->bi_bdev = tc->dev->bdev;