Index: head/sys/amd64/amd64/pmap.c
===================================================================
--- head/sys/amd64/amd64/pmap.c
+++ head/sys/amd64/amd64/pmap.c
@@ -4072,8 +4072,9 @@
 
 	return sysctl_handle_long(oidp, &ksize, 0, req);
 }
-SYSCTL_PROC(_vm, OID_AUTO, kvm_size, CTLTYPE_LONG|CTLFLAG_RD, 
-    0, 0, kvm_size, "LU", "Size of KVM");
+SYSCTL_PROC(_vm, OID_AUTO, kvm_size, CTLTYPE_LONG | CTLFLAG_RD | CTLFLAG_MPSAFE,
+    0, 0, kvm_size, "LU",
+    "Size of KVM");
 
 static int
 kvm_free(SYSCTL_HANDLER_ARGS)
@@ -4082,8 +4083,9 @@
 
 	return sysctl_handle_long(oidp, &kfree, 0, req);
 }
-SYSCTL_PROC(_vm, OID_AUTO, kvm_free, CTLTYPE_LONG|CTLFLAG_RD, 
-    0, 0, kvm_free, "LU", "Amount of KVM free");
+SYSCTL_PROC(_vm, OID_AUTO, kvm_free, CTLTYPE_LONG | CTLFLAG_RD | CTLFLAG_MPSAFE,
+    0, 0, kvm_free, "LU",
+    "Amount of KVM free");
 
 /*
  * Allocate physical memory for the vm_page array and map it into KVA,
Index: head/sys/arm64/arm64/pmap.c
===================================================================
--- head/sys/arm64/arm64/pmap.c
+++ head/sys/arm64/arm64/pmap.c
@@ -1845,8 +1845,9 @@
 
 	return sysctl_handle_long(oidp, &ksize, 0, req);
 }
-SYSCTL_PROC(_vm, OID_AUTO, kvm_size, CTLTYPE_LONG|CTLFLAG_RD,
-    0, 0, kvm_size, "LU", "Size of KVM");
+SYSCTL_PROC(_vm, OID_AUTO, kvm_size, CTLTYPE_LONG | CTLFLAG_RD | CTLFLAG_MPSAFE,
+    0, 0, kvm_size, "LU",
+    "Size of KVM");
 
 static int
 kvm_free(SYSCTL_HANDLER_ARGS)
@@ -1855,8 +1856,9 @@
 
 	return sysctl_handle_long(oidp, &kfree, 0, req);
 }
-SYSCTL_PROC(_vm, OID_AUTO, kvm_free, CTLTYPE_LONG|CTLFLAG_RD,
-    0, 0, kvm_free, "LU", "Amount of KVM free");
+SYSCTL_PROC(_vm, OID_AUTO, kvm_free, CTLTYPE_LONG | CTLFLAG_RD | CTLFLAG_MPSAFE,
+    0, 0, kvm_free, "LU",
+    "Amount of KVM free");
 
 /*
  * grow the number of kernel page table entries, if needed