$(1) : $(2):=$$($(2))
endef
-Device/Export = $(foreach var,$(DEVICE_VARS) KERNEL,$(call Device/ExportVar,$(1),$(var)))
+Device/Export = $(foreach var,$(DEVICE_VARS) KERNEL KERNEL_INITRAMFS FILESYSTEM,$(call Device/ExportVar,$(1),$(var)))
define Device/Check
_TARGET = $$(if $$(filter $(PROFILE),$$(PROFILES)),install,install-disabled)
endef
define Device/Build/kernel
+ $(KDIR)/$$(KERNEL_NAME): image_prepare
$$(_TARGET): $$(if $$(KERNEL_INSTALL),$(BIN_DIR)/$$(KERNEL_IMAGE))
$(BIN_DIR)/$$(KERNEL_IMAGE): $(KDIR)/$$(KERNEL_IMAGE)
cp $$^ $$@