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Date:   Tue, 21 Nov 2023 20:43:49 +0100
From:   Alexander Gordeev <>
To:     Andrew Morton <>,
        Vishal Moola <>
        Gerald Schaefer <>,
        Heiko Carstens <>
Subject: [PATCH v3 1/2] pgtable: fix s390 ptdesc field comments

Since commit d08d4e7cd6bf ("s390/mm: use full 4KB page for 2KB PTE")
there is no fragmented page tracking on s390. Fix the corresponding

Suggested-by: Heiko Carstens <>
Signed-off-by: Alexander Gordeev <>
 include/linux/mm_types.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 957ce38768b2..fbec64036baa 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -401,11 +401,11 @@ FOLIO_MATCH(compound_head, _head_2a);
  * @pmd_huge_pte:     Protected by ptdesc->ptl, used for THPs.
  * @__page_mapping:   Aliases with page->mapping. Unused for page tables.
  * @pt_mm:            Used for x86 pgds.
- * @pt_frag_refcount: For fragmented page table tracking. Powerpc and s390 only.
+ * @pt_frag_refcount: For fragmented page table tracking. Powerpc only.
  * @_pt_pad_2:        Padding to ensure proper alignment.
  * @ptl:              Lock for the page table.
  * @__page_type:      Same as page->page_type. Unused for page tables.
- * @_refcount:        Same as page refcount. Used for s390 page tables.
+ * @_refcount:        Same as page refcount.
  * @pt_memcg_data:    Memcg data. Tracked for page tables here.
  * This struct overlays struct page for now. Do not modify without a good

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