-header-y += asm-generic/ linux/ scsi/ sound/ mtd/ rdma/ video/
-header-y += asm-$(ARCH)/
+# Top-level Makefile calls into asm-$(ARCH)
+# List only non-arch directories below
+
+header-y += asm-generic/
+header-y += linux/
+header-y += sound/
+header-y += mtd/
+header-y += rdma/
+header-y += video/
+header-y += drm/