K 10
svn:author
V 3
cem
K 8
svn:date
V 27
2015-12-17T17:48:57.788610Z
K 7
svn:log
V 561
vm_page_replace: add wrapper to KASSERT about old page

It turns out the callers of vm_page_replace know exactly which page they are
replacing and would like to assert about it.  Change those from hard panics to
KASSERTs, and provide them with a wrapper so they don't have to deal with
warnings from an INVARIANTS-dependent dead store of the return value of
vm_page_replace.

Submitted by:	Ryan Libby <rlibby@gmail.com>
Reviewed by:	alc, kib (earlier version)
Sponsored by:	EMC / Isilon Storage Division
Differential Revision:	https://reviews.freebsd.org/D4497

END