Convert all callers of mem_cgroup_charge() to call page_folio() on the
page they're currently passing in.  Many of them will be converted to
use folios themselves soon.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 include/linux/memcontrol.h |  6 +++---
 kernel/events/uprobes.c    |  3 ++-
 mm/filemap.c               |  2 +-
 mm/huge_memory.c           |  2 +-
 mm/khugepaged.c            |  4 ++--
 mm/ksm.c                   |  3 ++-
 mm/memcontrol.c            | 26 +++++++++++++-------------
 mm/memory.c                |  9 +++++----
 mm/migrate.c               |  2 +-
 mm/shmem.c                 |  2 +-
 mm/userfaultfd.c           |  2 +-
 11 files changed, 32 insertions(+), 29 deletions(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index c2ffad021e09..03283d97b62a 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c

@@ -6697,27 +6696,27 @@ static int __mem_cgroup_charge(struct page *page, struct mem_cgroup *memcg,
 
 	local_irq_disable();
 	mem_cgroup_charge_statistics(memcg, nr_pages);
-	memcg_check_events(memcg, page_to_nid(page));
+	memcg_check_events(memcg, folio_nid(folio));
 	local_irq_enable();
 out:
 	return ret;
 }
 
 /**
- * mem_cgroup_charge - charge a newly allocated page to a cgroup
- * @page: page to charge
- * @mm: mm context of the victim
- * @gfp_mask: reclaim mode
+ * mem_cgroup_charge - Charge a newly allocated folio to a cgroup.
+ * @folio: Folio to charge.
+ * @mm: mm context of the allocating task.
+ * @gfp: reclaim mode
  *
- * Try to charge @page to the memcg that @mm belongs to, reclaiming
- * pages according to @gfp_mask if necessary. if @mm is NULL, try to
+ * Try to charge @folio to the memcg that @mm belongs to, reclaiming
+ * pages according to @gfp if necessary.  If @mm is NULL, try to
  * charge to the active memcg.
  *
- * Do not use this for pages allocated for swapin.
+ * Do not use this for folios allocated for swapin.
  *
  * Returns 0 on success. Otherwise, an error code is returned.