[PATCH mm-unstable v9 15/31] mm: remove page table members from struct page

Vishal Moola (Oracle)
2023-08-07T23:07:36Z

The page table members are now split out into their own ptdesc struct.
Remove them from struct page.

Signed-off-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Acked-by: Mike Rapoport (IBM) <rppt@kernel.org>
---
include/linux/mm_types.h | 21 ---------------------
1 file changed, 21 deletions(-)

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index ea34b22b4cbf..f5ba5b0bc836 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -141,24 +141,6 @@ struct page {
struct { /* Tail pages of compound page */
unsigned long compound_head; /* Bit zero is set */
};
- struct { /* Page table pages */
- unsigned long _pt_pad_1; /* compound_head */
- pgtable_t pmd_huge_pte; /* protected by page->ptl */
- /*
- * A PTE page table page might be freed by use of
- * rcu_head: which overlays those two fields above.
- */
- unsigned long _pt_pad_2; /* mapping */
- union {
- struct mm_struct *pt_mm; /* x86 pgds only */
- atomic_t pt_frag_refcount; /* powerpc */
- };
-#if ALLOC_SPLIT_PTLOCKS
- spinlock_t *ptl;
-#else
- spinlock_t ptl;
-#endif
- };
struct { /* ZONE_DEVICE pages */
/** @pgmap: Points to the hosting device page map. */
struct dev_pagemap *pgmap;
@@ -454,10 +436,7 @@ struct ptdesc {
TABLE_MATCH(flags, __page_flags);
TABLE_MATCH(compound_head, pt_list);
TABLE_MATCH(compound_head, _pt_pad_1);
-TABLE_MATCH(pmd_huge_pte, pmd_huge_pte);
TABLE_MATCH(mapping, __page_mapping);
-TABLE_MATCH(pt_mm, pt_mm);
-TABLE_MATCH(ptl, ptl);
TABLE_MATCH(rcu_head, pt_rcu_head);
TABLE_MATCH(page_type, __page_type);
TABLE_MATCH(_refcount, _refcount);
--
2.40.1