linux-kernel - [PATCH RFC 22/29] mm/page-flags: rename PAGE_MAPPING_MOVABLE to PAGE_MAPPING_ANON

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Message-ID: <20250618174014.1168640-23-david@redhat.com>
Date: Wed, 18 Jun 2025 19:40:05 +0200
From: David Hildenbrand <david@...hat.com>
To: linux-kernel@...r.kernel.org
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Subject: [PATCH RFC 22/29] mm/page-flags: rename PAGE_MAPPING_MOVABLE to PAGE_MAPPING_ANON_KSM

KSM is the only remaining user, let's rename the flag. While at it,
adjust to remaining page -> folio in the doc.

Signed-off-by: David Hildenbrand <david@...hat.com>
---
 include/linux/page-flags.h | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index aa48b05536bca..abed972e902e1 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -697,10 +697,10 @@ PAGEFLAG_FALSE(VmemmapSelfHosted, vmemmap_self_hosted)
  * folio->mapping points to its anon_vma, not to a struct address_space;
  * with the PAGE_MAPPING_ANON bit set to distinguish it.  See rmap.h.
  *
- * On an anonymous page in a VM_MERGEABLE area, if CONFIG_KSM is enabled,
- * the PAGE_MAPPING_MOVABLE bit may be set along with the PAGE_MAPPING_ANON
+ * On an anonymous folio in a VM_MERGEABLE area, if CONFIG_KSM is enabled,
+ * the PAGE_MAPPING_ANON_KSM bit may be set along with the PAGE_MAPPING_ANON
  * bit; and then folio->mapping points, not to an anon_vma, but to a private
- * structure which KSM associates with that merged page.  See ksm.h.
+ * structure which KSM associates with that merged folio.  See ksm.h.
  *
  * Please note that, confusingly, "folio_mapping" refers to the inode
  * address_space which maps the folio from disk; whereas "folio_mapped"
@@ -714,9 +714,9 @@ PAGEFLAG_FALSE(VmemmapSelfHosted, vmemmap_self_hosted)
  * See mm/slab.h.
  */
 #define PAGE_MAPPING_ANON	0x1
-#define PAGE_MAPPING_MOVABLE	0x2
-#define PAGE_MAPPING_KSM	(PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE)
-#define PAGE_MAPPING_FLAGS	(PAGE_MAPPING_ANON | PAGE_MAPPING_MOVABLE)
+#define PAGE_MAPPING_ANON_KSM	0x2
+#define PAGE_MAPPING_KSM	(PAGE_MAPPING_ANON | PAGE_MAPPING_ANON_KSM)
+#define PAGE_MAPPING_FLAGS	(PAGE_MAPPING_ANON | PAGE_MAPPING_ANON_KSM)
 
 static __always_inline bool folio_mapping_flags(const struct folio *folio)
 {
-- 
2.49.0