linux-kernel - [PATCH v2 03/14] mm/ksm: add folio_set_stable

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Message-ID: <20240322083703.232364-4-alexs@kernel.org>
Date: Fri, 22 Mar 2024 16:36:50 +0800
From: alexs@...nel.org
To: Matthew Wilcox <willy@...radead.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Izik Eidus <izik.eidus@...ellosystems.com>,
	david@...hat.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Cc: "Alex Shi (tencent)" <alexs@...nel.org>,
	Hugh Dickins <hughd@...gle.com>,
	Chris Wright <chrisw@...s-sol.org>
Subject: [PATCH v2 03/14] mm/ksm: add folio_set_stable_node

From: "Alex Shi (tencent)" <alexs@...nel.org>

Turn set_page_stable_node() into a wrapper folio_set_stable_node, and then
use it to replace the former. we will merge them together after all
place converted to folio.

Signed-off-by: Alex Shi (tencent) <alexs@...nel.org>
Cc: Izik Eidus <izik.eidus@...ellosystems.com>
Cc: Matthew Wilcox <willy@...radead.org>
Cc: Andrea Arcangeli <aarcange@...hat.com>
Cc: Hugh Dickins <hughd@...gle.com>
Cc: Chris Wright <chrisw@...s-sol.org>
---
 mm/ksm.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/mm/ksm.c b/mm/ksm.c
index ea3dabf71e47..c9b7c5701f22 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -1109,6 +1109,12 @@ static inline void set_page_stable_node(struct page *page,
 	page->mapping = (void *)((unsigned long)stable_node | PAGE_MAPPING_KSM);
 }
 
+static inline void folio_set_stable_node(struct folio *folio,
+					 struct ksm_stable_node *stable_node)
+{
+	set_page_stable_node(&folio->page, stable_node);
+}
+
 #ifdef CONFIG_SYSFS
 /*
  * Only called through the sysfs control interface:
@@ -3241,7 +3247,7 @@ void folio_migrate_ksm(struct folio *newfolio, struct folio *folio)
 		 * has gone stale (or that folio_test_swapcache has been cleared).
 		 */
 		smp_wmb();
-		set_page_stable_node(&folio->page, NULL);
+		folio_set_stable_node(folio, NULL);
 	}
 }
 #endif /* CONFIG_MIGRATION */
-- 
2.43.0