diff --git a/arch/x86_64/kernel/entry.S b/arch/x86_64/kernel/entry.S
index 6f810424df44ba4aeb5fcd6abb1aea960b07d50b..aa8d8939abc1692df22e7000c226095a44167678 100644
--- a/arch/x86_64/kernel/entry.S
+++ b/arch/x86_64/kernel/entry.S
@@ -973,6 +973,8 @@ ENTRY(kernel_thread)
 ENDPROC(kernel_thread)
 	
 child_rip:
+	pushq $0		# fake return address
+	CFI_STARTPROC
 	/*
 	 * Here we are in the child and the registers are set as they were
 	 * at kernel_thread() invocation in the parent.
@@ -983,6 +985,7 @@ child_rip:
 	# exit
 	xorl %edi, %edi
 	call do_exit
+	CFI_ENDPROC
 ENDPROC(child_rip)
 
 /*
diff --git a/arch/x86_64/kernel/head.S b/arch/x86_64/kernel/head.S
index 6df05e6034faf2cefdb0edfa6b85ef3535724608..c9739ca81d062e31c30aed9ac07df6f921fe5c1f 100644
--- a/arch/x86_64/kernel/head.S
+++ b/arch/x86_64/kernel/head.S
@@ -191,6 +191,7 @@ startup_64:
 	 * jump
 	 */
 	movq	initial_code(%rip),%rax
+	pushq	$0		# fake return address
 	jmp	*%rax
 
 	/* SMP bootup changes these two */