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From: Mark Johnston <markj@FreeBSD.org>
Date: Thu, 23 Jan 2020 17:18:58 +0000 (UTC)
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Subject: svn commit: r357055 - head/sys/sparc64/sparc64
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Author: markj
Date: Thu Jan 23 17:18:58 2020
New Revision: 357055
URL: https://svnweb.freebsd.org/changeset/base/357055

Log:
  sparc64: Busy the TSB page before freeing it in pmap_release().
  
  This is now required by vm_page_free().
  
  PR:	243534
  Reported and tested by:	Michael Reim <kraileth@elderlinux.org>

Modified:
  head/sys/sparc64/sparc64/pmap.c

Modified: head/sys/sparc64/sparc64/pmap.c
==============================================================================
--- head/sys/sparc64/sparc64/pmap.c	Thu Jan 23 17:08:33 2020	(r357054)
+++ head/sys/sparc64/sparc64/pmap.c	Thu Jan 23 17:18:58 2020	(r357055)
@@ -1302,6 +1302,7 @@ pmap_release(pmap_t pm)
 		m = TAILQ_FIRST(&obj->memq);
 		m->md.pmap = NULL;
 		vm_page_unwire_noq(m);
+		vm_page_xbusy(m);
 		vm_page_free_zero(m);
 	}
 	VM_OBJECT_WUNLOCK(obj);