Index: x86/x86/mca.c
===================================================================
--- x86/x86/mca.c
+++ x86/x86/mca.c
@@ -104,6 +104,7 @@
     "Administrative toggle for logging of spurious corrected errors");
 
 int workaround_erratum383;
+TUNABLE_INT("hw.workaround_erratum383", &workaround_erratum383);
 SYSCTL_INT(_hw_mca, OID_AUTO, erratum383, CTLFLAG_RD, &workaround_erratum383, 0,
     "Is the workaround for Erratum 383 on AMD Family 10h processors enabled?");