BACKPORT: mm: handle large folios in free_unref_folios()

Call folio_undo_large_rmappable() if needed.  free_unref_page_prepare()
destroys the ability to call folio_order(), so stash the order in
folio->private for the benefit of the second loop.

Link: https://lkml.kernel.org/r/20240227174254.710559-10-willy@infradead.org


Change-Id: I7227614956f7f2bc7136694309e3be87a667d55e
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
(cherry picked from commit 31b2ff82)
[ Replace folio_undo_large_rmappable() with
    folio_unqueue_deferred_split() - Kalesh Singh ]
Bug: 420771453
Signed-off-by: Kalesh Singh <kaleshsingh@google.com>