linux-kernel - [PATCH 11/18] mm: memory: use mm_counter_file_folio() in wp_page

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Date:   Fri, 3 Nov 2023 22:01:12 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
CC:     <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
        Matthew Wilcox <willy@...radead.org>,
        David Hildenbrand <david@...hat.com>,
        <linux-s390@...r.kernel.org>,
        Kefeng Wang <wangkefeng.wang@...wei.com>
Subject: [PATCH 11/18] mm: memory: use mm_counter_file_folio() in wp_page_copy()

Use mm_counter_file_folio() to save one compound_head() call.

Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
---
 mm/memory.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memory.c b/mm/memory.c
index d35ca499bf1c..661c649afc22 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3158,7 +3158,7 @@ static vm_fault_t wp_page_copy(struct vm_fault *vmf)
 	if (likely(vmf->pte && pte_same(ptep_get(vmf->pte), vmf->orig_pte))) {
 		if (old_folio) {
 			if (!folio_test_anon(old_folio)) {
-				dec_mm_counter(mm, mm_counter_file(&old_folio->page));
+				dec_mm_counter(mm, mm_counter_file_folio(old_folio));
 				inc_mm_counter(mm, MM_ANONPAGES);
 			}
 		} else {
-- 
2.27.0