+ifneq ($(CONFIG_LINUX_2_4)$(CONFIG_LINUX_2_6_21)$(CONFIG_LINUX_2_6_25),)
+USE_SQUASHFS3 := y
+endif
+
+ifneq ($(USE_SQUASHFS3),)
+MKSQUASHFS_CMD := $(STAGING_DIR_HOST)/bin/mksquashfs-lzma
+else
+MKSQUASHFS_CMD := $(STAGING_DIR_HOST)/bin/mksquashfs4
+SQUASHFS_OPTS := -comp lzma -processors 1
+endif
+
+JFFS2_BLOCKSIZE ?= 64k 128k
+
+define add_jffs2_mark
+ echo -ne '\xde\xad\xc0\xde' >> $(1)
+endef
+
+# pad to 4k, 8k, 64k, 128k and add jffs2 end-of-filesystem mark
+define prepare_generic_squashfs
+ dd if=$(1) of=$(KDIR)/tmpfile.0 bs=4k conv=sync
+ $(call add_jffs2_mark,$(KDIR)/tmpfile.0)
+ dd if=$(KDIR)/tmpfile.0 of=$(KDIR)/tmpfile.1 bs=4k conv=sync
+ $(call add_jffs2_mark,$(KDIR)/tmpfile.1)
+ dd if=$(KDIR)/tmpfile.1 of=$(KDIR)/tmpfile.2 bs=64k conv=sync
+ $(call add_jffs2_mark,$(KDIR)/tmpfile.2)
+ dd if=$(KDIR)/tmpfile.2 of=$(1) bs=64k conv=sync
+ $(call add_jffs2_mark,$(1))
+ rm -f $(KDIR)/tmpfile.*
+endef
+