$(eval rootsize=$(call mtdpartsize,rootfs,$(4)))
$(call Sysupgrade/RKuImage,$(1),$(2),$(kernsize),$(rootsize))
if [ -e "$(call sysupname,$(1),$(2))" ]; then \
$(eval rootsize=$(call mtdpartsize,rootfs,$(4)))
$(call Sysupgrade/RKuImage,$(1),$(2),$(kernsize),$(rootsize))
if [ -e "$(call sysupname,$(1),$(2))" ]; then \