From f157761902001d0183aae593e9cc768b02e81bcf Mon Sep 17 00:00:00 2001
From: Edward Tomasz Napierala <trasz@FreeBSD.org>
Date: Mon, 5 Oct 2020 18:41:35 +0000
Subject: [PATCH] Drop useless assignment, and add a KASSERT to make sure it
 really was useless.

Reviewed by:	nick, jhb
Sponsored by:	DARPA
Differential Revision:	https://reviews.freebsd.org/D26649
---
 sys/riscv/riscv/trap.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sys/riscv/riscv/trap.c b/sys/riscv/riscv/trap.c
index 983e1062b5c..7d25a195ed9 100644
--- a/sys/riscv/riscv/trap.c
+++ b/sys/riscv/riscv/trap.c
@@ -163,7 +163,9 @@ svc_handler(struct trapframe *frame)
 	struct thread *td;
 
 	td = curthread;
-	td->td_frame = frame;
+
+	KASSERT(td->td_frame == frame,
+	    ("%s: td_frame %p != frame %p", __func__, td->td_frame, frame));
 
 	syscallenter(td);
 	syscallret(td);