diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S
index e8ef83d..3eeb169 100644
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -321,7 +321,7 @@
 
 opportunistic_sysret_failed:
 	SWAPGS
-	jmp	restore_regs_and_iret
+	jmp	restore_regs_and_return_to_usermode
 END(entry_SYSCALL_64)
 
 ENTRY(stub_ptregs_64)
@@ -423,7 +423,7 @@
 	call	syscall_return_slowpath	/* returns with IRQs disabled */
 	TRACE_IRQS_ON			/* user mode is traced as IRQS on */
 	SWAPGS
-	jmp	restore_regs_and_iret
+	jmp	restore_regs_and_return_to_usermode
 
 1:
 	/* kernel thread */
@@ -612,7 +612,20 @@
 	call	prepare_exit_to_usermode
 	TRACE_IRQS_IRETQ
 	SWAPGS
-	jmp	restore_regs_and_iret
+
+GLOBAL(restore_regs_and_return_to_usermode)
+#ifdef CONFIG_DEBUG_ENTRY
+	/* Assert that pt_regs indicates user mode. */
+	testl	$3, CS(%rsp)
+	jnz	1f
+	ud2
+1:
+#endif
+	RESTORE_EXTRA_REGS
+	RESTORE_C_REGS
+	REMOVE_PT_GPREGS_FROM_STACK 8
+	INTERRUPT_RETURN
+
 
 /* Returning to kernel space */
 retint_kernel:
@@ -632,11 +645,14 @@
 	 */
 	TRACE_IRQS_IRETQ
 
-/*
- * At this label, code paths which return to kernel and to user,
- * which come from interrupts/exception and from syscalls, merge.
- */
-GLOBAL(restore_regs_and_iret)
+GLOBAL(restore_regs_and_return_to_kernel)
+#ifdef CONFIG_DEBUG_ENTRY
+	/* Assert that pt_regs indicates kernel mode. */
+	testl	$3, CS(%rsp)
+	jz	1f
+	ud2
+1:
+#endif
 	RESTORE_EXTRA_REGS
 	RESTORE_C_REGS
 	REMOVE_PT_GPREGS_FROM_STACK 8
@@ -1327,7 +1343,7 @@
 	 * work, because we don't want to enable interrupts.
 	 */
 	SWAPGS
-	jmp	restore_regs_and_iret
+	jmp	restore_regs_and_return_to_usermode
 
 .Lnmi_from_kernel:
 	/*
diff --git a/arch/x86/entry/entry_64_compat.S b/arch/x86/entry/entry_64_compat.S
index e26c25c..9ca014a 100644
--- a/arch/x86/entry/entry_64_compat.S
+++ b/arch/x86/entry/entry_64_compat.S
@@ -337,7 +337,7 @@
 	/* Go back to user mode. */
 	TRACE_IRQS_ON
 	SWAPGS
-	jmp	restore_regs_and_iret
+	jmp	restore_regs_and_return_to_usermode
 END(entry_INT80_compat)
 
 ENTRY(stub32_clone)
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index 189bf42..08f067f 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -326,7 +326,7 @@
 
 20:
 	decl early_recursion_flag(%rip)
-	jmp restore_regs_and_iret
+	jmp restore_regs_and_return_to_kernel
 END(early_idt_handler_common)
 
 	__INITDATA