linux-kernel - [PATCH 2/5] mm: task_mmu: use a folio in smaps

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Message-ID: <20231103072906.2000381-3-wangkefeng.wang@huawei.com>
Date:   Fri, 3 Nov 2023 15:29:03 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
CC:     <linux-kernel@...r.kernel.org>, <linux-fsdevel@...r.kernel.org>,
        <linux-mm@...ck.org>, Matthew Wilcox <willy@...radead.org>,
        David Hildenbrand <david@...hat.com>,
        Kefeng Wang <wangkefeng.wang@...wei.com>
Subject: [PATCH 2/5] mm: task_mmu: use a folio in smaps_account()

Replace seven implicit calls to compound_head() with one page_folio().

Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
---
 fs/proc/task_mmu.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index ef2eb12906da..5ec06fee1f14 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -445,23 +445,25 @@ static void smaps_account(struct mem_size_stats *mss, struct page *page,
 {
 	int i, nr = compound ? compound_nr(page) : 1;
 	unsigned long size = nr * PAGE_SIZE;
+	struct folio *folio = page_folio(page);
 
 	/*
 	 * First accumulate quantities that depend only on |size| and the type
 	 * of the compound page.
 	 */
-	if (PageAnon(page)) {
+	if (folio_test_anon(folio)) {
 		mss->anonymous += size;
-		if (!PageSwapBacked(page) && !dirty && !PageDirty(page))
+		if (!folio_test_swapbacked(folio) && !dirty &&
+		    !folio_test_dirty(folio))
 			mss->lazyfree += size;
 	}
 
-	if (PageKsm(page))
+	if (folio_test_ksm(folio))
 		mss->ksm += size;
 
 	mss->resident += size;
 	/* Accumulate the size in pages that have been accessed. */
-	if (young || page_is_young(page) || PageReferenced(page))
+	if (young || folio_test_young(folio) || folio_test_referenced(folio))
 		mss->referenced += size;
 
 	/*
@@ -479,7 +481,7 @@ static void smaps_account(struct mem_size_stats *mss, struct page *page,
 	 * especially for migration entries.  Treat regular migration entries
 	 * as mapcount == 1.
 	 */
-	if ((page_count(page) == 1) || migration) {
+	if ((folio_ref_count(folio) == 1) || migration) {
 		smaps_page_accumulate(mss, page, size, size << PSS_SHIFT, dirty,
 			locked, true);
 		return;
-- 
2.27.0