From 3abd7a16dd6a0a529b7eab1ef31a3819b54a931e Mon Sep 17 00:00:00 2001
From: Robert Morris <rtm@csail.mit.edu>
Date: Tue, 9 Aug 2022 13:41:45 -0400
Subject: [PATCH] comment

---
 kernel/riscv.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/riscv.h b/kernel/riscv.h
index 1f8a503..7e358f1 100644
--- a/kernel/riscv.h
+++ b/kernel/riscv.h
@@ -183,6 +183,7 @@ w_mtvec(uint64 x)
   asm volatile("csrw mtvec, %0" : : "r" (x));
 }
 
+// Physical Memory Protection
 static inline void
 w_pmpcfg0(uint64 x)
 {