[Differential] [Updated] D1438: FreeBSD callout rewrite and cleanup

[eadler (Eitan Adler)]

eadler removed a reviewer: Doc Committers.

REPOSITORY
  rS FreeBSD src repository

REVISION DETAIL
  https://reviews.freebsd.org/D1438

EMAIL PREFERENCES
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To: hselasky, jhb, adrian, markj, emaste, sbruno, imp, lstewart, rwatson, gnn, rrs, kostikbel, delphij, neel, erj
Cc: avg, jch, wblock, freebsd-net