From f26c7b7e7fae60ce8cf7fbb77b6056fe534c81c0 Mon Sep 17 00:00:00 2001
From: pk <pk@NetBSD.org>
Date: Mon, 3 Mar 2003 22:43:58 +0000
Subject: [PATCH] Note a kernel pmap locking problem in pmap_kenter_pa4m().

---
 sys/arch/sparc/sparc/pmap.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/sys/arch/sparc/sparc/pmap.c b/sys/arch/sparc/sparc/pmap.c
index d072b472ea92..07004544e702 100644
--- a/sys/arch/sparc/sparc/pmap.c
+++ b/sys/arch/sparc/sparc/pmap.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: pmap.c,v 1.248 2003/03/02 21:37:21 pk Exp $ */
+/*	$NetBSD: pmap.c,v 1.249 2003/03/03 22:43:58 pk Exp $ */
 
 /*
  * Copyright (c) 1996
@@ -6356,13 +6356,21 @@ pmap_kenter_pa4m(va, pa, prot)
 	sp = &rp->rg_segmap[vs];
 
 	s = splvm();
+#ifdef notyet
+	/* XXX - we can be called with the kernel map already locked
+	 *	 pmap_enter4m()->pv_link()->pool_get()
+	 *	 figure out another way to protect `sg_npte' update.
+	 */
 	simple_lock(&pm->pm_lock);
+#endif
 	tpte = sp->sg_pte[VA_SUN4M_VPG(va)];
 	KASSERT((tpte & SRMMU_TETYPE) != SRMMU_TEPTE);
 
 	sp->sg_npte++;
 	setpgt4m(&sp->sg_pte[VA_SUN4M_VPG(va)], pteproto);
+#ifdef notyet
 	simple_unlock(&pm->pm_lock);
+#endif
 	splx(s);
 }