From ea919671517a46b75f975fcf126e08ccf7e9c09f Mon Sep 17 00:00:00 2001 From: Qi Zheng Date: Mon, 4 Mar 2024 19:07:19 +0800 Subject: mm: pgtable: add missing pt_index to struct ptdesc 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@bytedance.com Signed-off-by: Qi Zheng Cc: Christian Borntraeger Cc: Claudio Imbrenda Cc: David Hildenbrand Cc: Hugh Dickins Cc: Janosch Frank Cc: Matthew Wilcox (Oracle) Cc: Mike Rapoport (IBM) Cc: Muchun Song Cc: Vishal Moola (Oracle) Signed-off-by: Andrew Morton --- include/linux/mm_types.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/linux/mm_types.h') diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 5ea77969daae..5240bd7bca33 100644 --- a/include/linux/mm_types.h +++ b/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); -- cgit v1.2.3