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Code such as hardened user copy[1] needs a way to tell if a
page is CMA or not. Add is_migrate_cma_page in a similar way
to is_migrate_isolate_page.
[1]http://article.gmane.org/gmane.linux.kernel.mm/155238
Signed-off-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Change-Id: I1f9aa13d8d063038fa70b93282a836648fbb4f6d
(cherry picked from commit 7c15d9bb82)
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>