K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2015-07-02T15:22:13.527953Z
K 7
svn:log
V 420
Account for the main process stack being one page below the highest
user address when ABI uses shared page.

Note that the change is no-op for correctness, since shared page does
not fault.  The mapping for the shared page is installed at the
address space creation, the page is unmanaged and its pte/pv entry
cannot be reclaimed.

Submitted by:	Oliver Pinter
Review:	https://reviews.freebsd.org/D2954
MFC after:	1 week

END