K 10
svn:author
V 4
avos
K 8
svn:date
V 27
2017-10-16T21:21:31.254143Z
K 7
svn:log
V 343
ifnet(9): split ifc_alloc_unit() (should simplify code flow)

Allocate smallest unit number from pool via ifc_alloc_unit_next()
and exact unit number (if available) via ifc_alloc_unit_specific().

While here, address possible deadlock (mentioned in PR).

PR:		217401
MFC after:	5 days
Differential Revision:	https://reviews.freebsd.org/D12551

END