Backout all changes to uvm after pmemrange (which will be backed out

separately).

a change at or just before the hackathon has either exposed or added a
very very nasty memory corruption bug that is giving us hell right now.
So in the interest of kernel stability these diffs are being backed out
until such a time as that corruption bug has been found and squashed,
then the ones that are proven good may slowly return.

a quick hitlist of the main commits this backs out:

mine:
uvm_objwire
the lock change in uvm_swap.c
using trees for uvm objects instead of the hash
removing the pgo_releasepg callback.

art@'s:
putting pmap_page_protect(VM_PROT_NONE) in uvm_pagedeactivate() since
all callers called that just prior anyway.

ok beck@, ariane@.

prompted by deraadt@.

1 files changed, 5 insertions, 5 deletions

diff --git a/sys/arch/hppa/hppa/pmap.c b/sys/arch/hppa/hppa/pmap.c
index 5f9d72ab8b9..34e5652adae 100644
--- a/sys/arch/hppa/hppa/pmap.c
+++ b/sys/arch/hppa/hppa/pmap.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pmap.c,v 1.136 2009/06/11 20:10:51 kettenis Exp $	*/
+/*	$OpenBSD: pmap.c,v 1.137 2009/06/16 00:11:29 oga Exp $	*/
 
 /*
  * Copyright (c) 1998-2004 Michael Shalayeff
@@ -235,7 +235,7 @@ pmap_pde_release(struct pmap *pmap, vaddr_t va, struct vm_page *ptp)
 		pmap_pde_set(pmap, va, 0);
 		pmap->pm_stats.resident_count--;
 		if (pmap->pm_ptphint == ptp)
-			pmap->pm_ptphint = RB_ROOT(&pmap->pm_obj.memt);
+			pmap->pm_ptphint = TAILQ_FIRST(&pmap->pm_obj.memq);
 		ptp->wire_count = 0;
 #ifdef DIAGNOSTIC
 		if (ptp->pg_flags & PG_BUSY)
@@ -470,7 +470,7 @@ pmap_bootstrap(vstart)
 	bzero(kpm, sizeof(*kpm));
 	simple_lock_init(&kpm->pm_lock);
 	kpm->pm_obj.pgops = NULL;
-	RB_INIT(&kpm->pm_obj.memt);
+	TAILQ_INIT(&kpm->pm_obj.memq);
 	kpm->pm_obj.uo_npages = 0;
 	kpm->pm_obj.uo_refs = 1;
 	kpm->pm_space = HPPA_SID_KERNEL;
@@ -656,7 +656,7 @@ pmap_create()
 
 	simple_lock_init(&pmap->pm_lock);
 	pmap->pm_obj.pgops = NULL;	/* currently not a mappable object */
-	RB_INIT(&pmap->pm_obj.memt);
+	TAILQ_INIT(&pmap->pm_obj.memq);
 	pmap->pm_obj.uo_npages = 0;
 	pmap->pm_obj.uo_refs = 1;
 
@@ -698,7 +698,7 @@ pmap_destroy(pmap)
 		return;
 
 #ifdef DIAGNOSTIC
-	while ((pg = RB_ROOT(&pmap->pm_obj.memt))) {
+	while ((pg = TAILQ_FIRST(&pmap->pm_obj.memq))) {
 		pt_entry_t *pde, *epde;
 		struct vm_page *sheep;
 		struct pv_entry *haggis;