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svn:author
V 2
mm
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svn:date
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2011-10-30T21:03:12.574982Z
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MFC r226512:

Import fix for Illumos bug #1475 to reduce diff against upstream.

Panic caused by this bug was already partially fixed by pjd@
in p4 CH 185940 and 185942.

Reference:
1475 zfs spill block hold can access invalid spill blkptr
https://www.illumos.org/issues/1475

Reviewed by:	delphij
Obtained from:	Illumos (issue 1475, changeset 13469:b8e89e5c4167)

END