s390/mm: Convert gmap_make_secure to use a folio

[ Upstream commit d35c34bb ]

Remove uses of deprecated page APIs, and move the check for large
folios to here to avoid taking the folio lock if the folio is too large.
We could do better here by attempting to split the large folio, but I'll
leave that improvement for someone who can test it.

Acked-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Link: https://lore.kernel.org/r/20240322161149.2327518-3-willy@infradead.org


Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Stable-dep-of: 3f29f653 ("s390/uv: Don't call folio_wait_writeback() without a folio reference")
Signed-off-by: Sasha Levin <sashal@kernel.org>