Mark Johnston 2fb9a51077 Don't include DMAR map entry zone items in kernel dumps.
Such items may be allocated in the I/O path used by the dumper,
potentially causing the dump to fail. Since there is some precedent
in the DMAR driver for avoiding this problem using _NODUMP, apply
this workaround to the zone as well.

Reported and tested by:	mmacy
Reviewed by:	kib
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D14422
2018-02-18 16:03:50 +00:00
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