K 10
svn:author
V 3
cem
K 8
svn:date
V 27
2017-04-18T21:05:05.232205Z
K 7
svn:log
V 270
da(4): Fix a TRIM regression introduced in r308155

According to Warner, multiple TRIM BIOs are collapsed into a single CCB with
NULL bp.  It is invalid to biotrack() NULL, and results in a fault.  So,
don't do that.

Reported by:	asomers@
Sponsored by:	Dell EMC Isilon

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