diff --git a/[refs] b/[refs]
index de5daf85bf79..87e158243ed0 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f377fa123d0ec621e8e361ecc3f2a8ee70e81a2e
+refs/heads/master: 5f5db591326779a80cfe490c5d6b6ce9fac08b31
diff --git a/trunk/arch/x86/kernel/entry_32.S b/trunk/arch/x86/kernel/entry_32.S
index 28b597ef9ca1..f6402c4ba10d 100644
--- a/trunk/arch/x86/kernel/entry_32.S
+++ b/trunk/arch/x86/kernel/entry_32.S
@@ -1051,6 +1051,7 @@ ENTRY(kernel_thread_helper)
 	push %eax
 	CFI_ADJUST_CFA_OFFSET 4
 	call do_exit
+	ud2			# padding for call trace
 	CFI_ENDPROC
 ENDPROC(kernel_thread_helper)
 
diff --git a/trunk/arch/x86/kernel/entry_64.S b/trunk/arch/x86/kernel/entry_64.S
index ddeeb1052583..4a16bf31c783 100644
--- a/trunk/arch/x86/kernel/entry_64.S
+++ b/trunk/arch/x86/kernel/entry_64.S
@@ -1172,6 +1172,7 @@ child_rip:
 	# exit
 	mov %eax, %edi
 	call do_exit
+	ud2			# padding for call trace
 	CFI_ENDPROC
 ENDPROC(child_rip)