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pgtable: fix s390 ptdesc field comments

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Patch series "minor ptdesc updates", v3.


This patch (of 2):

Since commit d08d4e7cd6 ("s390/mm: use full 4KB page for 2KB PTE") there
is no fragmented page tracking on s390.  Fix the corresponding comments.

Link: https://lkml.kernel.org/r/cover.1700594815.git.agordeev@linux.ibm.com
Link: https://lkml.kernel.org/r/2eead241f3a45bed26c7911cf66bded1e35670b8.1700594815.git.agordeev@linux.ibm.com
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Suggested-by: Heiko Carstens <hca@linux.ibm.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Alexander Gordeev 2023-11-21 20:43:49 +01:00 committed by Andrew Morton
parent 50668b53f8
commit 38ca8a1853
1 changed files with 2 additions and 2 deletions
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4
include/linux/mm_types.h
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@ -401,11 +401,11 @@ FOLIO_MATCH(compound_head, _head_2a);
* @pmd_huge_pte: Protected by ptdesc->ptl, used for THPs. * @pmd_huge_pte: Protected by ptdesc->ptl, used for THPs.
* @__page_mapping: Aliases with page->mapping. Unused for page tables. * @__page_mapping: Aliases with page->mapping. Unused for page tables.
* @pt_mm: Used for x86 pgds. * @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. * @_pt_pad_2: Padding to ensure proper alignment.
* @ptl: Lock for the page table. * @ptl: Lock for the page table.
* @__page_type: Same as page->page_type. Unused for page tables. * @__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. * @pt_memcg_data: Memcg data. Tracked for page tables here.
* *
* This struct overlays struct page for now. Do not modify without a good * This struct overlays struct page for now. Do not modify without a good