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From: Mark Johnston <markj@FreeBSD.org>
Date: Fri, 20 Jul 2018 16:31:09 +0000 (UTC)
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Subject: svn commit: r336556 - head/sys/arm64/arm64
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Author: markj
Date: Fri Jul 20 16:31:08 2018
New Revision: 336556
URL: https://svnweb.freebsd.org/changeset/base/336556

Log:
  Initialize the L3 page's wire count correctly after a L2 entry demotion.
  
  Reviewed by:	alc
  MFC after:	1 week
  Differential Revision:	https://reviews.freebsd.org/D16303

Modified:
  head/sys/arm64/arm64/pmap.c

Modified: head/sys/arm64/arm64/pmap.c
==============================================================================
--- head/sys/arm64/arm64/pmap.c	Fri Jul 20 16:18:24 2018	(r336555)
+++ head/sys/arm64/arm64/pmap.c	Fri Jul 20 16:31:08 2018	(r336556)
@@ -4784,6 +4784,7 @@ pmap_demote_l2_locked(pmap_t pmap, pt_entry_t *l2, vm_
 	 * If the page table page is new, initialize it.
 	 */
 	if (ml3->wire_count == 1) {
+		ml3->wire_count = NL3PG;
 		for (i = 0; i < Ln_ENTRIES; i++) {
 			l3[i] = newl3 | phys;
 			phys += L3_SIZE;