K 10
svn:author
V 5
markj
K 8
svn:date
V 27
2019-06-26T17:37:51.063456Z
K 7
svn:log
V 500
Add a return value to vm_page_remove().

Use it to indicate whether the page may be safely freed following
its removal from the object.  Also change vm_page_remove() to assume
that the page's object pointer is non-NULL, and have callers perform
this check instead.

This is a step towards an implementation of an atomic reference counter
for each physical page structure.

Reviewed by:	alc, dougm, kib
MFC after:	1 week
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D20758

END