[src/trunk]: src/sys/kern Fix md(4) double attachment in TFTPROOT option

[manu <manu%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/93c09075f483
branches:  trunk
changeset: 359349:93c09075f483
user:      manu <manu%NetBSD.org@localhost>
date:      Wed Feb 07 15:51:35 2018 +0000

description:
Fix md(4) double attachment in TFTPROOT option

The mdattach() call in tftproot_dhcpboot() has probably always been
useless, but it seems it became harmful, as it causes 7.1.1 to deadlock
during boot.

diffstat:

 sys/kern/subr_tftproot.c |  7 ++-----
 1 files changed, 2 insertions(+), 5 deletions(-)

diffs (35 lines):

diff -r b637d44216aa -r 93c09075f483 sys/kern/subr_tftproot.c
--- a/sys/kern/subr_tftproot.c  Wed Feb 07 14:42:07 2018 +0000
+++ b/sys/kern/subr_tftproot.c  Wed Feb 07 15:51:35 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: subr_tftproot.c,v 1.19 2016/10/31 15:27:24 maxv Exp $ */
+/*     $NetBSD: subr_tftproot.c,v 1.20 2018/02/07 15:51:35 manu Exp $ */
 
 /*-
  * Copyright (c) 2007 Emmanuel Dreyfus, all rights reserved.
@@ -39,7 +39,7 @@
 #include "opt_md.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: subr_tftproot.c,v 1.19 2016/10/31 15:27:24 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: subr_tftproot.c,v 1.20 2018/02/07 15:51:35 manu Exp $");
 
 #include <sys/param.h>
 #include <sys/types.h>
@@ -65,8 +65,6 @@
 #include <nfs/nfsdiskless.h>
 #include <nfs/nfs_var.h>
 
-extern void       mdattach(int);
-
 /* 
  * Copied from <lib/libsa/tftp.h> 
  */
@@ -333,7 +331,6 @@
        DPRINTF(("%s():%d RAMdisk loaded: %ld@%p\n", 
            __func__, __LINE__, trh->trh_len, trh->trh_base));
        md_root_setconf(trh->trh_base, trh->trh_len);
-       mdattach(0);
 
        error = 0;
 out: