+ifeq ($(CONFIG_KERNEL_ROOT_NFS),y)
+ define Kernel/SetNfsCmdline
+ rm -f $(LINUX_DIR)/.config.prev
+ mv $(LINUX_DIR)/.config $(LINUX_DIR)/.config.old
+ grep -v "CONFIG_CMDLINE=" $(LINUX_DIR)/.config.old > $(LINUX_DIR)/.config
+ grep "CONFIG_CMDLINE=" $(LINUX_DIR)/.config.old | cut -d\" -f2 | sed 's/root=\/dev\/\([a-z0-9]*\)\(.*\)/CONFIG_CMDLINE=\"root=\/dev\/nfs ip=dhcp\2\"/' >> $(LINUX_DIR)/.config
+ endef
+else
+ define Kernel/SetNfsCmdline
+ endef
+endif
+