[src/trunk]: src/sys/arch/x86/x86 emap: reduce the number of atomic ops.

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

details:   https://anonhg.NetBSD.org/src/rev/a96b71f898e1
branches:  trunk
changeset: 779740:a96b71f898e1
user:      yamt <yamt%NetBSD.org@localhost>
date:      Fri Jun 15 13:53:40 2012 +0000

description:
emap: reduce the number of atomic ops.

diffstat:

 sys/arch/x86/x86/pmap.c |  12 ++++++------
 1 files changed, 6 insertions(+), 6 deletions(-)

diffs (51 lines):

diff -r 9dfec38b06dc -r a96b71f898e1 sys/arch/x86/x86/pmap.c
--- a/sys/arch/x86/x86/pmap.c   Fri Jun 15 13:51:40 2012 +0000
+++ b/sys/arch/x86/x86/pmap.c   Fri Jun 15 13:53:40 2012 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pmap.c,v 1.177 2012/04/20 22:23:24 rmind Exp $ */
+/*     $NetBSD: pmap.c,v 1.178 2012/06/15 13:53:40 yamt Exp $  */
 
 /*-
  * Copyright (c) 2008, 2010 The NetBSD Foundation, Inc.
@@ -171,7 +171,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.177 2012/04/20 22:23:24 rmind Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.178 2012/06/15 13:53:40 yamt Exp $");
 
 #include "opt_user_ldt.h"
 #include "opt_lockdebug.h"
@@ -1014,7 +1014,7 @@
 void
 pmap_emap_enter(vaddr_t va, paddr_t pa, vm_prot_t prot)
 {
-       pt_entry_t *pte, opte, npte;
+       pt_entry_t *pte, npte;
 
        KASSERT((prot & ~VM_PROT_ALL) == 0);
        pte = (va < VM_MIN_KERNEL_ADDRESS) ? vtopte(va) : kvtopte(va);
@@ -1028,7 +1028,7 @@
 
        npte = pmap_pa2pte(pa);
        npte |= protection_codes[prot] | PG_k | PG_V;
-       opte = pmap_pte_testset(pte, npte);
+       pmap_pte_set(pte, npte);
 }
 
 /*
@@ -1061,12 +1061,12 @@
 void
 pmap_emap_remove(vaddr_t sva, vsize_t len)
 {
-       pt_entry_t *pte, xpte;
+       pt_entry_t *pte;
        vaddr_t va, eva = sva + len;
 
        for (va = sva; va < eva; va += PAGE_SIZE) {
                pte = (va < VM_MIN_KERNEL_ADDRESS) ? vtopte(va) : kvtopte(va);
-               xpte |= pmap_pte_testset(pte, 0);
+               pmap_pte_set(pte, 0);
        }
 }