From 18998096701a1d4695b2097006d7afc2a539bd89 Mon Sep 17 00:00:00 2001
From: Robert Morris <rtm@csail.mit.edu>
Date: Fri, 8 Sep 2023 09:24:27 -0400
Subject: 3rd lab

---
 kernel/sysproc.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

(limited to 'kernel/sysproc.c')

diff --git a/kernel/sysproc.c b/kernel/sysproc.c
index 3b4d5bd..88644b2 100644
--- a/kernel/sysproc.c
+++ b/kernel/sysproc.c
@@ -1,7 +1,7 @@
 #include "types.h"
 #include "riscv.h"
-#include "defs.h"
 #include "param.h"
+#include "defs.h"
 #include "memlayout.h"
 #include "spinlock.h"
 #include "proc.h"
@@ -54,9 +54,8 @@ sys_sleep(void)
   int n;
   uint ticks0;
 
+
   argint(0, &n);
-  if(n < 0)
-    n = 0;
   acquire(&tickslock);
   ticks0 = ticks;
   while(ticks - ticks0 < n){
@@ -70,6 +69,16 @@ sys_sleep(void)
   return 0;
 }
 
+
+#ifdef LAB_PGTBL
+int
+sys_pgaccess(void)
+{
+  // lab pgtbl: your code here.
+  return 0;
+}
+#endif
+
 uint64
 sys_kill(void)
 {
-- 
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