+ mm-huge_memory-change-folio_split_supported-to-folio_check_splittable-fix.patch added to mm-unstable branch

+ mm-huge_memory-change-folio_split_supported-to-folio_check_splittable-fix.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm-huge_memory-change-folio_split_supported-to-folio_check_splittable-fix
has been added to the -mm mm-unstable branch.  Its filename is
     mm-huge_memory-change-folio_split_supported-to-folio_check_splittable-fix.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-huge_memory-change-folio_split_supported-to-folio_check_splittable-fix.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Andrew Morton <akpm@linux-foundation.org>
Subject: mm-huge_memory-change-folio_split_supported-to-folio_check_splittable-fix
Date: Tue Nov 25 09:43:05 AM PST 2025

enhance comment, per David

Link: https://lkml.kernel.org/r/e5118fe1-7963-4f09-a80b-e6185ffcb366@kernel.org
Cc: Balbir Singh <balbirs@nvidia.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: David Hildenbrand (Red Hat) <david@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Naoya Horiguchi <nao.horiguchi@gmail.com>
Cc: Nico Pache <npache@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/huge_memory.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/mm/huge_memory.c~mm-huge_memory-change-folio_split_supported-to-folio_check_splittable-fix
+++ a/mm/huge_memory.c
@@ -3714,7 +3714,8 @@ int folio_check_splittable(struct folio
 	 * caller that there was a race.
 	 *
 	 * TODO: this will also currently refuse shmem folios that are in the
-	 * swapcache.
+	 * swapcache.  Currently it will also refuse folios without a mapping
+	 * in the swapcache (shmem or to-be-anon folios).
 	 */
 	if (!folio_test_anon(folio) && !folio->mapping)
 		return -EBUSY;
_

Patches currently in -mm which might be from akpm@linux-foundation.org are

mm-huge_memory-change-folio_split_supported-to-folio_check_splittable-fix.patch
memblock-unpreserve-memory-in-case-of-error-fix.patch