+ifneq ($(CONFIG_LINUX_2_6_21)$(CONFIG_LINUX_2_6_25)$(CONFIG_LINUX_2_6_28),)
+USE_SQUASHFS3 := y
+endif
+
+ifneq ($(USE_SQUASHFS3),)
+MKSQUASHFS_CMD := $(STAGING_DIR_HOST)/bin/mksquashfs-lzma
+else
+MKSQUASHFS_CMD := $(STAGING_DIR_HOST)/bin/mksquashfs4
+SQUASHFS_OPTS := -lzma -processors 1
+endif
+
+JFFS2_BLOCKSIZE ?= 64k 128k
+
+define add_jffs2_mark
+ echo -ne '\xde\xad\xc0\xde' >> $(1)
+endef
+
+# pad to 64k and add jffs2 end-of-filesystem mark
+# do this twice to make sure that this works with 128k blocksize as well
+define prepare_generic_squashfs
+ dd if=$(1) of=$(KDIR)/tmpfile.1 bs=64k conv=sync
+ $(call add_jffs2_mark,$(KDIR)/tmpfile.1)
+ dd of=$(1) if=$(KDIR)/tmpfile.1 bs=64k conv=sync
+ $(call add_jffs2_mark,$(1))
+endef
+