From 4882c80975e2bf7241a5b043eb1dbe8df2726a29 Mon Sep 17 00:00:00 2001
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Date: Tue, 27 Feb 2024 17:42:39 +0000
Subject: memcg: add mem_cgroup_uncharge_folios()

Almost identical to mem_cgroup_uncharge_list(), except it takes a
folio_batch instead of a list_head.

Link: https://lkml.kernel.org/r/20240227174254.710559-6-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
 mm/memcontrol.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'mm/memcontrol.c')

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index e4864e2729e6..2edb250d131b 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -33,6 +33,7 @@
 #include <linux/shmem_fs.h>
 #include <linux/hugetlb.h>
 #include <linux/pagemap.h>
+#include <linux/pagevec.h>
 #include <linux/vm_event_item.h>
 #include <linux/smp.h>
 #include <linux/page-flags.h>
@@ -7531,6 +7532,18 @@ void __mem_cgroup_uncharge_list(struct list_head *page_list)
 		uncharge_batch(&ug);
 }
 
+void __mem_cgroup_uncharge_folios(struct folio_batch *folios)
+{
+	struct uncharge_gather ug;
+	unsigned int i;
+
+	uncharge_gather_clear(&ug);
+	for (i = 0; i < folios->nr; i++)
+		uncharge_folio(folios->folios[i], &ug);
+	if (ug.memcg)
+		uncharge_batch(&ug);
+}
+
 /**
  * mem_cgroup_replace_folio - Charge a folio's replacement.
  * @old: Currently circulating folio.
-- 
cgit