From da3b931ddbc66da95b916b95e5258f3a506ac521 Mon Sep 17 00:00:00 2001
From: Frans Kaashoek <kaashoek@mit.edu>
Date: Tue, 8 Aug 2017 19:42:51 -0400
Subject: [PATCH] Thanks Anton Burtsev <aburtsev@uci.edu>

---
 kalloc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kalloc.c b/kalloc.c
index ca30d55..428c639 100644
--- a/kalloc.c
+++ b/kalloc.c
@@ -11,6 +11,7 @@
 
 void freerange(void *vstart, void *vend);
 extern char end[]; // first address after kernel loaded from ELF file
+                   // defined by the kernel linker script in kernel.ld
 
 struct run {
   struct run *next;