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 <[email protected]>

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);
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