2.6.18-*el5*) LDISKFS_SERIES="2.6-rhel5.series";;
2.6.18-*prep*) LDISKFS_SERIES="2.6-rhel5.series";;
2.6.18*) LDISKFS_SERIES="2.6.18-vanilla.series";;
+2.6.22*) LDISKFS_SERIES="2.6.22-vanilla.series";;
*) AC_MSG_WARN([Unknown kernel version $LINUXRELEASE, fix ldiskfs/configure.ac])
esac
AC_MSG_RESULT([$LDISKFS_SERIES])