linux-kernel - [PATCH RFC 14/29] mm/migrate: remove _

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Message-ID: <20250618174014.1168640-15-david@redhat.com>
Date: Wed, 18 Jun 2025 19:39:57 +0200
From: David Hildenbrand <david@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: linux-mm@...ck.org,
	linux-doc@...r.kernel.org,
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	Shakeel Butt <shakeel.butt@...ux.dev>
Subject: [PATCH RFC 14/29] mm/migrate: remove __ClearPageMovable()

Unused, let's remove it.

The Chinese docs in Documentation/translations/zh_CN/mm/page_migration.rst
still mention it, but that whole docs is destined to get outdated and
updated by somebody that actually speaks that language.

Signed-off-by: David Hildenbrand <david@...hat.com>
---
 include/linux/migrate.h |  4 ----
 mm/compaction.c         | 11 -----------
 2 files changed, 15 deletions(-)

diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index c99a00d4ca27d..fb6e9612e9f0b 100644
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -106,16 +106,12 @@ static inline int migrate_huge_page_move_mapping(struct address_space *mapping,
 #ifdef CONFIG_COMPACTION
 bool PageMovable(struct page *page);
 void __SetPageMovable(struct page *page, const struct movable_operations *ops);
-void __ClearPageMovable(struct page *page);
 #else
 static inline bool PageMovable(struct page *page) { return false; }
 static inline void __SetPageMovable(struct page *page,
 		const struct movable_operations *ops)
 {
 }
-static inline void __ClearPageMovable(struct page *page)
-{
-}
 #endif
 
 static inline
diff --git a/mm/compaction.c b/mm/compaction.c
index 17455c5a4be05..889ec696ba96a 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -137,17 +137,6 @@ void __SetPageMovable(struct page *page, const struct movable_operations *mops)
 }
 EXPORT_SYMBOL(__SetPageMovable);
 
-void __ClearPageMovable(struct page *page)
-{
-	VM_BUG_ON_PAGE(!PageMovable(page), page);
-	/*
-	 * This page still has the type of a movable page, but it's
-	 * actually not movable any more.
-	 */
-	page->mapping = (void *)PAGE_MAPPING_MOVABLE;
-}
-EXPORT_SYMBOL(__ClearPageMovable);
-
 /* Do not skip compaction more than 64 times */
 #define COMPACT_MAX_DEFER_SHIFT 6
 
-- 
2.49.0