Index: pmap.c
===================================================================
RCS file: /cvs/src/sys/arch/sparc64/sparc64/pmap.c,v
retrieving revision 1.99
diff -u -p -r1.99 pmap.c
--- pmap.c	30 Apr 2017 16:45:45 -0000	1.99
+++ pmap.c	3 May 2017 11:49:30 -0000
@@ -1041,6 +1041,7 @@ remap_data:
 	/*
 	 * Allocate and clear out pmap_kernel()->pm_segs[]
 	 */
+	mtx_init(&pmap_kernel()->pm_mtx, IPL_VM);
 	pmap_kernel()->pm_refs = 1;
 	pmap_kernel()->pm_ctx = 0;
 	{