From 858475e4dfabb61dc72ab5b4f105e2a0a636e7e8 Mon Sep 17 00:00:00 2001
From: Robert Morris <rtm@csail.mit.edu>
Date: Wed, 10 Aug 2016 10:51:14 -0400
Subject: tiny clarifications to some gdt code.

---
 vm.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'vm.c')

diff --git a/vm.c b/vm.c
index 85f6ce2..cd36db5 100644
--- a/vm.c
+++ b/vm.c
@@ -9,7 +9,6 @@
 
 extern char data[];  // defined by kernel.ld
 pde_t *kpgdir;  // for use in scheduler()
-struct segdesc gdt[NSEGS];
 
 // Set up CPU's kernel segment descriptors.
 // Run once on entry on each CPU.
@@ -28,7 +27,7 @@ seginit(void)
   c->gdt[SEG_UCODE] = SEG(STA_X|STA_R, 0, 0xffffffff, DPL_USER);
   c->gdt[SEG_UDATA] = SEG(STA_W, 0, 0xffffffff, DPL_USER);
 
-  // Map cpu, and curproc
+  // Map cpu and curproc -- these are private per cpu.
   c->gdt[SEG_KCPU] = SEG(STA_W, &c->cpu, 8, 0);
 
   lgdt(c->gdt, sizeof(c->gdt));
-- 
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