--- /sbin/mkinitrd	2007-05-12 00:19:56.000000000 +0200
+++ mkinitrd	2007-05-26 23:07:06.000000000 +0200
@@ -45,6 +45,7 @@
   -o      Output image (default /boot/initrd.gz)
   -r      Root partition device (must be used with -f)
   -s      Initrd source tree (default /boot/initrd-tree/)
+  -C      Add support for crypted partitions
   -V      Display version number
 
 A simple example:  Build an initrd for a reiserfs root partition:
@@ -179,6 +180,9 @@
       SOURCE_TREE="$2"
       shift 2
       ;;
+    -C)
+      CRYPT=1
+      shift
     *) # unknown, prevent infinite loop
       shift
       ;;
@@ -206,6 +210,19 @@
 INITRD_NAME=$(basename $OUTPUT_IMAGE)
 echo $INITRD_NAME > $SOURCE_TREE/initrd-name
 
+# Include cryptsetup (LUKS) support in initrd
+if [ ! -z "$CRYPT" ]; then
+  if [ -e /sbin/cryptsetup.static ]; then
+    mkdir -p $SOURCE_TREE/sbin
+    cp /sbin/cryptsetup.static $SOURCE_TREE/sbin/cryptsetup.static
+    ( cd $SOURCE_TREE/sbin
+      ln -s cryptsetup.static cryptsetup
+    )
+  else
+    echo "Cryptsetup static binary is missing, CRYPT support isn't installed"
+  fi
+fi
+
 # Make module directory:
 if [ ! -d $SOURCE_TREE/lib/modules/$KERNEL_VERSION ]; then
   mkdir -p $SOURCE_TREE/lib/modules/$KERNEL_VERSION