The patch titled
Subject: mm: pgtable: add missing pt_index to struct ptdesc
has been added to the -mm mm-unstable branch. Its filename is
mm-pgtable-add-missing-pt_index-to-struct-ptdesc.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-pgtable-add-missing-pt_index-to-struct-ptdesc.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: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
Subject: mm: pgtable: add missing pt_index to struct ptdesc
Date: Mon, 4 Mar 2024 19:07:19 +0800
In s390, the page->index field is used for gmap (see gmap_shadow_pgt()),
so add the corresponding pt_index to struct ptdesc and add a comment to
clarify this.
Link: https://lkml.kernel.org/r/283624c2af45fb2090b41a6b1b5481bb0a45bad7.1709541697.git.zhengqi.arch@xxxxxxxxxxxxx
Signed-off-by: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
Cc: Christian Borntraeger <borntraeger@xxxxxxxxxxxxx>
Cc: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Janosch Frank <frankja@xxxxxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
Cc: Muchun Song <muchun.song@xxxxxxxxx>
Cc: Vishal Moola (Oracle) <vishal.moola@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mm_types.h | 3 +++
1 file changed, 3 insertions(+)
--- a/include/linux/mm_types.h~mm-pgtable-add-missing-pt_index-to-struct-ptdesc
+++ a/include/linux/mm_types.h
@@ -425,6 +425,7 @@ FOLIO_MATCH(compound_head, _head_2a);
* @_pt_pad_1: Padding that aliases with page's compound head.
* @pmd_huge_pte: Protected by ptdesc->ptl, used for THPs.
* @__page_mapping: Aliases with page->mapping. Unused for page tables.
+ * @pt_index: Used for s390 gmap.
* @pt_mm: Used for x86 pgds.
* @pt_frag_refcount: For fragmented page table tracking. Powerpc only.
* @_pt_pad_2: Padding to ensure proper alignment.
@@ -450,6 +451,7 @@ struct ptdesc {
unsigned long __page_mapping;
union {
+ pgoff_t pt_index;
struct mm_struct *pt_mm;
atomic_t pt_frag_refcount;
};
@@ -475,6 +477,7 @@ TABLE_MATCH(flags, __page_flags);
TABLE_MATCH(compound_head, pt_list);
TABLE_MATCH(compound_head, _pt_pad_1);
TABLE_MATCH(mapping, __page_mapping);
+TABLE_MATCH(index, pt_index);
TABLE_MATCH(rcu_head, pt_rcu_head);
TABLE_MATCH(page_type, __page_type);
TABLE_MATCH(_refcount, __page_refcount);
_
Patches currently in -mm which might be from zhengqi.arch@xxxxxxxxxxxxx are
mm-userfaultfd-fix-unexpected-change-to-src_folio-when-uffdio_move-fails.patch
mm-pgtable-correct-the-wrong-comment-about-ptdesc-__page_flags.patch
mm-pgtable-add-missing-pt_index-to-struct-ptdesc.patch
s390-supplement-for-ptdesc-conversion.patch
