[src/trunk]: src/sys/arch/alpha Define a macro, VM_MDPAGE_PVS(), for fetching...

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

details:   https://anonhg.NetBSD.org/src/rev/43ba5d583f0a
branches:  trunk
changeset: 379396:43ba5d583f0a
user:      thorpej <thorpej%NetBSD.org@localhost>
date:      Sun May 30 05:26:09 2021 +0000

description:
Define a macro, VM_MDPAGE_PVS(), for fetching the first pv entry
for a page.

diffstat:

 sys/arch/alpha/alpha/pmap.c   |  16 +++++++---------
 sys/arch/alpha/include/pmap.h |   5 ++++-
 2 files changed, 11 insertions(+), 10 deletions(-)

diffs (98 lines):

diff -r 27a57ec61ef5 -r 43ba5d583f0a sys/arch/alpha/alpha/pmap.c
--- a/sys/arch/alpha/alpha/pmap.c       Sun May 30 04:04:26 2021 +0000
+++ b/sys/arch/alpha/alpha/pmap.c       Sun May 30 05:26:09 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.c,v 1.285 2021/05/30 04:04:26 thorpej Exp $ */
+/* $NetBSD: pmap.c,v 1.286 2021/05/30 05:26:09 thorpej Exp $ */
 
 /*-
  * Copyright (c) 1998, 1999, 2000, 2001, 2007, 2008, 2020
@@ -135,7 +135,7 @@
 
 #include <sys/cdefs.h>                 /* RCS ID & Copyright macro defns */
 
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.285 2021/05/30 04:04:26 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.286 2021/05/30 05:26:09 thorpej Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -1823,7 +1823,6 @@ pmap_remove(pmap_t pmap, vaddr_t sva, va
 void
 pmap_page_protect(struct vm_page *pg, vm_prot_t prot)
 {
-       struct vm_page_md * const md = VM_PAGE_TO_MD(pg);
        pv_entry_t pv, nextpv;
        pt_entry_t opte;
        kmutex_t *lock;
@@ -1851,7 +1850,7 @@ pmap_page_protect(struct vm_page *pg, vm
                PMAP_HEAD_TO_MAP_LOCK();
                lock = pmap_pvh_lock(pg);
                mutex_enter(lock);
-               for (pv = md->pvh_list; pv != NULL; pv = pv->pv_next) {
+               for (pv = VM_MDPAGE_PVS(pg); pv != NULL; pv = pv->pv_next) {
                        PMAP_LOCK(pv->pv_pmap);
                        opte = atomic_load_relaxed(pv->pv_pte);
                        if (opte & (PG_KWE | PG_UWE)) {
@@ -1876,7 +1875,7 @@ pmap_page_protect(struct vm_page *pg, vm
        PMAP_HEAD_TO_MAP_LOCK();
        lock = pmap_pvh_lock(pg);
        mutex_enter(lock);
-       for (pv = md->pvh_list; pv != NULL; pv = nextpv) {
+       for (pv = VM_MDPAGE_PVS(pg); pv != NULL; pv = nextpv) {
                pt_entry_t pte_bits;
                pmap_t pmap;
                vaddr_t va;
@@ -3007,7 +3006,6 @@ static void
 pmap_changebit(struct vm_page *pg, pt_entry_t set, pt_entry_t mask,
     struct pmap_tlb_context * const tlbctx)
 {
-       struct vm_page_md * const md = VM_PAGE_TO_MD(pg);
        pv_entry_t pv;
        pt_entry_t *pte, npte, opte;
 
@@ -3020,7 +3018,7 @@ pmap_changebit(struct vm_page *pg, pt_en
        /*
         * Loop over all current mappings setting/clearing as apropos.
         */
-       for (pv = md->pvh_list; pv != NULL; pv = pv->pv_next) {
+       for (pv = VM_MDPAGE_PVS(pg); pv != NULL; pv = pv->pv_next) {
                PMAP_LOCK(pv->pv_pmap);
 
                pte = pv->pv_pte;
@@ -3176,7 +3174,7 @@ pmap_pv_dump(paddr_t pa)
        mutex_enter(lock);
 
        printf("pa 0x%lx (attrs = 0x%x):\n", pa, md->pvh_attrs);
-       for (pv = md->pvh_list; pv != NULL; pv = pv->pv_next)
+       for (pv = VM_MDPAGE_PVS(pg); pv != NULL; pv = pv->pv_next)
                printf("     pmap %p, va 0x%lx\n",
                    pv->pv_pmap, pv->pv_va);
        printf("\n");
@@ -3264,7 +3262,7 @@ pmap_pv_enter(pmap_t pmap, struct vm_pag
        /*
         * Make sure the entry doesn't already exist.
         */
-       for (pv = md->pvh_list; pv != NULL; pv = pv->pv_next) {
+       for (pv = VM_MDPAGE_PVS(pg); pv != NULL; pv = pv->pv_next) {
                if (pmap == pv->pv_pmap && va == pv->pv_va) {
                        printf("pmap = %p, va = 0x%lx\n", pmap, va);
                        panic("pmap_pv_enter: already in pv table");
diff -r 27a57ec61ef5 -r 43ba5d583f0a sys/arch/alpha/include/pmap.h
--- a/sys/arch/alpha/include/pmap.h     Sun May 30 04:04:26 2021 +0000
+++ b/sys/arch/alpha/include/pmap.h     Sun May 30 05:26:09 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.h,v 1.91 2021/05/30 04:04:26 thorpej Exp $ */
+/* $NetBSD: pmap.h,v 1.92 2021/05/30 05:26:09 thorpej Exp $ */
 
 /*-
  * Copyright (c) 1998, 1999, 2000, 2001, 2007 The NetBSD Foundation, Inc.
@@ -363,6 +363,9 @@ struct vm_page_md {
        int pvh_attrs;                          /* page attributes */
 };
 
+#define        VM_MDPAGE_PVS(pg)                                               \
+       ((pg)->mdpage.pvh_list)
+
 #define        VM_MDPAGE_INIT(pg)                                              \
 do {                                                                   \
        (pg)->mdpage.pvh_list = NULL;                                   \