mm/memcg: Convert mem_cgroup_track_foreign_dirty_slowpath() to folio

The page was only being used for the memcg and to gather trace
information, so this is a simple conversion.  The only caller of
mem_cgroup_track_foreign_dirty() will be converted to folios in a later
patch, so doing this now makes that patch simpler.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Howells <dhowells@redhat.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>

1 files changed, 3 insertions, 3 deletions

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index c83d2f862f8a..4a04bddefdbc 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4516,17 +4516,17 @@ void mem_cgroup_wb_stats(struct bdi_writeback *wb, unsigned long *pfilepages,
  * As being wrong occasionally doesn't matter, updates and accesses to the
  * records are lockless and racy.
  */
-void mem_cgroup_track_foreign_dirty_slowpath(struct page *page,
+void mem_cgroup_track_foreign_dirty_slowpath(struct folio *folio,
 					     struct bdi_writeback *wb)
 {
-	struct mem_cgroup *memcg = page_memcg(page);
+	struct mem_cgroup *memcg = folio_memcg(folio);
 	struct memcg_cgwb_frn *frn;
 	u64 now = get_jiffies_64();
 	u64 oldest_at = now;
 	int oldest = -1;
 	int i;
 
-	trace_track_foreign_dirty(page, wb);
+	trace_track_foreign_dirty(folio, wb);
 
 	/*
 	 * Pick the slot to use.  If there is already a slot for @wb, keep