Commit 4f054c28 authored by Vishal Moola (Oracle)'s avatar Vishal Moola (Oracle) Committed by Andrew Morton
Browse files

mm: remove page table members from struct page 

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

Link: https://lkml.kernel.org/r/20230807230513.102486-16-vishal.moola@gmail.com


Signed-off-by: default avatarVishal Moola (Oracle) <vishal.moola@gmail.com>
Acked-by: default avatarMike Rapoport (IBM) <rppt@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Dinh Nguyen <dinguyen@kernel.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Guo Ren <guoren@kernel.org>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Palmer Dabbelt <palmer@rivosinc.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 6326c26c

include/linux/mm_types.h

+0 −21
Original line number Diff line number Diff line
@@ -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);