svn commit: r340443 - head/sys/kern

[Gleb Smirnoff]

Author: glebius
Date: Wed Nov 14 19:10:35 2018
New Revision: 340443
URL: https://svnweb.freebsd.org/changeset/base/340443

Log:
  Initialize compatibility epoch tracker for thread0. Fixes
  panics for drivers that call if_maddr_lock() during startup.
  
  Reported by:	cy

Modified:
  head/sys/kern/init_main.c

Modified: head/sys/kern/init_main.c
==============================================================================
--- head/sys/kern/init_main.c	Wed Nov 14 19:06:43 2018	(r340442)
+++ head/sys/kern/init_main.c	Wed Nov 14 19:10:35 2018	(r340443)
@@ -52,6 +52,7 @@ __FBSDID("$FreeBSD$");
 
 #include <sys/param.h>
 #include <sys/kernel.h>
+#include <sys/epoch.h>
 #include <sys/exec.h>
 #include <sys/file.h>
 #include <sys/filedesc.h>
@@ -510,6 +511,7 @@ proc0_init(void *dummy __unused)
 	td->td_pflags = TDP_KTHREAD;
 	td->td_cpuset = cpuset_thread0();
 	td->td_domain.dr_policy = td->td_cpuset->cs_domain;
+	epoch_thread_init(td);
 	prison0_init();
 	p->p_peers = 0;
 	p->p_leader = p;