-INITRD_COMPRESS=gzip
-ifeq ($(CONFIG_RD_BZIP2), y)
- INITRD_COMPRESS=bzip2
-else ifeq ($(CONFIG_RD_LZMA), y)
- INITRD_COMPRESS=lzma
-else ifeq ($(CONFIG_RD_XZ), y)
- INITRD_COMPRESS=xz
-else ifeq ($(CONFIG_RD_LZO), y)
- INITRD_COMPRESS=lzo
-else ifeq ($(CONFIG_RD_LZ4), y)
- INITRD_COMPRESS=lz4
-endif
-export INITRD_COMPRESS
+INITRD_COMPRESS-y := gzip
+INITRD_COMPRESS-$(CONFIG_RD_BZIP2) := bzip2
+INITRD_COMPRESS-$(CONFIG_RD_LZMA) := lzma
+INITRD_COMPRESS-$(CONFIG_RD_XZ) := xz
+INITRD_COMPRESS-$(CONFIG_RD_LZO) := lzo
+INITRD_COMPRESS-$(CONFIG_RD_LZ4) := lz4
+# do not export INITRD_COMPRESS, since we didn't actually
+# choose a sane default compression above.
+# export INITRD_COMPRESS := $(INITRD_COMPRESS-y)