[src/trunk]: src/sys/arch/alpha/alpha Update a couple of comments for reality.

[thorpej <thorpej%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/25008b83be9f
branches:  trunk
changeset: 486651:25008b83be9f
user:      thorpej <thorpej%NetBSD.org@localhost>
date:      Sat May 27 06:29:35 2000 +0000

description:
Update a couple of comments for reality.

diffstat:

 sys/arch/alpha/alpha/vm_machdep.c |  17 ++++++-----------
 1 files changed, 6 insertions(+), 11 deletions(-)

diffs (52 lines):

diff -r c41a91fc6f77 -r 25008b83be9f sys/arch/alpha/alpha/vm_machdep.c
--- a/sys/arch/alpha/alpha/vm_machdep.c Sat May 27 06:08:28 2000 +0000
+++ b/sys/arch/alpha/alpha/vm_machdep.c Sat May 27 06:29:35 2000 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: vm_machdep.c,v 1.55 2000/03/29 03:49:48 simonb Exp $ */
+/* $NetBSD: vm_machdep.c,v 1.56 2000/05/27 06:29:35 thorpej Exp $ */
 
 /*
  * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
@@ -29,7 +29,7 @@
 
 #include <sys/cdefs.h>                 /* RCS ID & Copyright macro defns */
 
-__KERNEL_RCSID(0, "$NetBSD: vm_machdep.c,v 1.55 2000/03/29 03:49:48 simonb Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vm_machdep.c,v 1.56 2000/05/27 06:29:35 thorpej Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -174,9 +174,7 @@
        }
 
        /*
-        * Copy pcb and stack from proc p1 to p2.
-        * We do this as cheaply as possible, copying only the active
-        * part of the stack.  The stack and pcb need to agree;
+        * Copy pcb and user stack pointer from proc p1 to p2.
         */
        p2->p_addr->u_pcb = p1->p_addr->u_pcb;
        p2->p_addr->u_pcb.pcb_hw.apcb_usp = alpha_pal_rdusp();
@@ -275,8 +273,9 @@
 
 /*
  * Finish a swapin operation.
- * We neded to update the cached PTEs for the user area in the
- * machine dependent part of the proc structure.
+ *
+ * We need to cache the physical address of the PCB, so we can
+ * swap context to it easily.
  */
 void
 cpu_swapin(p)
@@ -284,10 +283,6 @@
 {
        struct user *up = p->p_addr;
 
-       /*
-        * Cache the physical address of the pcb, so we can swap to
-        * it easily.
-        */
        p->p_md.md_pcbpaddr = (void *)vtophys((vaddr_t)&up->u_pcb);
 }