--- zzzz-none-000/linux-3.10.107/arch/mips/boot/compressed/head.S	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/mips/boot/compressed/head.S	2021-02-04 17:41:59.000000000 +0000
@@ -25,6 +25,22 @@
 	move	s2, a2
 	move	s3, a3
 
+#ifdef CONFIG_MIPS_ZBOOT_APPENDED_DTB
+	PTR_LA	t0, __appended_dtb
+#ifdef CONFIG_CPU_BIG_ENDIAN
+	li	t1, 0xd00dfeed
+#else
+	li	t1, 0xedfe0dd0
+#endif
+	lw	t2, (t0)
+	bne	t1, t2, not_found
+	 nop
+
+	move	s1, t0
+	PTR_LI	s0, -2
+not_found:
+#endif
+
 	/* Clear BSS */
 	PTR_LA	a0, _edata
 	PTR_LA	a2, _end