Re: kern/52462: aac driver (and possibly others) needs MPification

[Havard Eidnes <he%NetBSD.org@localhost>]

>  Ok. For the next try: remove the patch and simply declare ld as non-mpsafe
>  by removing the D_MPSAFE flags.

OK, did that with

vk# cvs diff sys/dev/ld.c
Index: sys/dev/ld.c
===================================================================
RCS file: /cvsroot/src/sys/dev/ld.c,v
retrieving revision 1.101
diff -u -r1.101 ld.c
--- sys/dev/ld.c        27 Apr 2017 17:07:22 -0000      1.101
+++ sys/dev/ld.c        8 Aug 2017 12:56:06 -0000
@@ -92,7 +92,7 @@
        .d_dump = lddump,
        .d_psize = ldsize,
        .d_discard = lddiscard,
-       .d_flag = D_DISK | D_MPSAFE
+       .d_flag = D_DISK
 };
 
 const struct cdevsw ld_cdevsw = {
@@ -107,7 +107,7 @@
        .d_mmap = nommap,
        .d_kqfilter = nokqfilter,
        .d_discard = lddiscard,
-       .d_flag = D_DISK | D_MPSAFE
+       .d_flag = D_DISK
 };
 
 static struct  dkdriver lddkdriver = {
vk#

and now the machine behaves as it should, and no longer panics or
wedges.

Regards,

- Håvard