K 10
svn:author
V 3
mjg
K 8
svn:date
V 27
2016-08-27T22:43:41.530779Z
K 7
svn:log
V 200
vfs: provide a common exit point in namei for error cases

This shortens the function, adds the SDT_PROBE use for error cases and
consistenly unrefs rootdir last.

Reviewed by:	kib
MFC after:	2 weeks

END