Index: prepare-kernel.sh
===================================================================
--- prepare-kernel.sh	(revision 610)
+++ prepare-kernel.sh	(working copy)
@@ -42,7 +42,7 @@
         recursive_opt=""
         directorytype_opt=""
         if test x$recursive = xr; then
-            directorytype_opt="\( -type d -mindepth 1 \) -o"
+            directorytype_opt="( -type d -mindepth 1 ) -o"
         else
             recursive_opt="-maxdepth 1"
         fi
@@ -51,13 +51,13 @@
             link_makefiles_opt="-name Makefile -o"
         fi
 
-        if test "x$output_patch" = "x"; then
+        if test "x$output_patch" = "x" -a -e $linux_tree/$link_dir; then
             cd $linux_tree/$link_dir &&
 	    find . $recursive_opt \( $directorytype_opt \
                 $link_makefiles_opt -name $config_file -o -name '*.[chS]' \) |
             while read f; do
                 if test ! -e $xenomai_root/$target_dir/$f; then rm -Rf $f; fi
-            done; else true; fi &&
+            done
         fi
 
         cd $xenomai_root/$target_dir &&