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Message-ID: <20260209144058.2092871-1-rppt@kernel.org> Date: Mon, 9 Feb 2026 16:40:53 +0200 From: Mike Rapoport <rppt@...nel.org> To: Andrew Morton <akpm@...ux-foundation.org> Cc: Andreas Larsson <andreas@...sler.com>, Borislav Petkov <bp@...en8.de>, Brian Cain <bcain@...nel.org>, Catalin Marinas <catalin.marinas@....com>, "Christophe Leroy (CS GROUP)" <chleroy@...nel.org>, "David S. Miller" <davem@...emloft.net>, Dave Hansen <dave.hansen@...ux.intel.com>, David Hildenbrand <david@...nel.org>, Dinh Nguyen <dinguyen@...nel.org>, Geert Uytterhoeven <geert@...ux-m68k.org>, Guo Ren <guoren@...nel.org>, Helge Deller <deller@....de>, Huacai Chen <chenhuacai@...nel.org>, Ingo Molnar <mingo@...hat.com>, Johannes Berg <johannes@...solutions.net>, John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>, "Liam R. Howlett" <Liam.Howlett@...cle.com>, Lorenzo Stoakes <lorenzo.stoakes@...cle.com>, Madhavan Srinivasan <maddy@...ux.ibm.com>, Magnus Lindholm <linmag7@...il.com>, Matt Turner <mattst88@...il.com>, Max Filippov <jcmvbkbc@...il.com>, Michael Ellerman <mpe@...erman.id.au>, Michal Hocko <mhocko@...e.com>, Michal Simek <monstr@...str.eu>, Mike Rapoport <rppt@...nel.org>, Palmer Dabbelt <palmer@...belt.com>, Richard Weinberger <richard@....at>, Russell King <linux@...linux.org.uk>, Stafford Horne <shorne@...il.com>, Suren Baghdasaryan <surenb@...gle.com>, Thomas Gleixner <tglx@...nel.org>, Vineet Gupta <vgupta@...nel.org>, Vlastimil Babka <vbabka@...e.cz>, Will Deacon <will@...nel.org>, linux-alpha@...r.kernel.org, linux-kernel@...r.kernel.org, linux-snps-arc@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org, linux-csky@...r.kernel.org, linux-hexagon@...r.kernel.org, loongarch@...ts.linux.dev, linux-m68k@...ts.linux-m68k.org, linux-openrisc@...r.kernel.org, linux-parisc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, linux-riscv@...ts.infradead.org, linux-sh@...r.kernel.org, sparclinux@...r.kernel.org, linux-um@...ts.infradead.org, linux-mm@...ck.org, x86@...nel.org Subject: [PATCH v2 0/4] arch, mm: consolidate empty_zero_page From: "Mike Rapoport (Microsoft)" <rppt@...nel.org> Hi, These patches cleanup handling of ZERO_PAGE() and zero_pfn. v2 changes: * add patches that cleanup zero_pfn code a bit (patches 1,2) * add a patch that caches struct page for empty_zero_page (patch 4) * use uint8_t instead of unsigned long for empty_zero_page * fix sparc64 changes in patch 3 v1: https://lore.kernel.org/all/20260124095628.668870-1-rppt@kernel.org Mike Rapoport (Microsoft) (4): mm: don't special case !MMU for is_zero_pfn() and my_zero_pfn() mm: rename my_zero_pfn() to zero_pfn() arch, mm: consolidate empty_zero_page mm: cache struct page for empty_zero_page and return it from ZERO_PAGE() arch/alpha/include/asm/pgtable.h | 6 --- arch/arc/include/asm/pgtable.h | 3 -- arch/arc/mm/init.c | 2 - arch/arm/include/asm/pgtable.h | 9 ----- arch/arm/mm/mmu.c | 7 ---- arch/arm/mm/nommu.c | 7 ---- arch/arm64/include/asm/pgtable.h | 7 ---- arch/arm64/mm/init.c | 5 +++ arch/arm64/mm/mmu.c | 7 ---- arch/csky/include/asm/pgtable.h | 3 -- arch/csky/mm/init.c | 3 -- arch/hexagon/include/asm/pgtable.h | 6 --- arch/hexagon/kernel/head.S | 5 --- arch/hexagon/kernel/hexagon_ksyms.c | 1 - arch/loongarch/include/asm/pgtable.h | 9 ----- arch/loongarch/mm/init.c | 3 -- arch/m68k/include/asm/pgtable_mm.h | 9 ----- arch/m68k/include/asm/pgtable_no.h | 7 ---- arch/m68k/mm/init.c | 9 ----- arch/m68k/mm/mcfmmu.c | 2 - arch/m68k/mm/motorola.c | 6 --- arch/m68k/mm/sun3mmu.c | 2 - arch/microblaze/include/asm/pgtable.h | 10 ----- arch/microblaze/kernel/head.S | 4 -- arch/microblaze/kernel/microblaze_ksyms.c | 2 - arch/mips/mm/init.c | 11 +----- arch/nios2/include/asm/pgtable.h | 7 ---- arch/nios2/kernel/head.S | 10 ----- arch/nios2/kernel/nios2_ksyms.c | 1 - arch/openrisc/include/asm/pgtable.h | 4 -- arch/openrisc/kernel/head.S | 3 -- arch/openrisc/kernel/or32_ksyms.c | 1 - arch/openrisc/mm/init.c | 3 -- arch/parisc/include/asm/pgtable.h | 11 ------ arch/parisc/mm/init.c | 6 --- arch/powerpc/include/asm/pgtable.h | 6 --- arch/powerpc/mm/mem.c | 3 -- arch/riscv/include/asm/pgtable.h | 7 ---- arch/riscv/mm/init.c | 4 -- arch/s390/mm/init.c | 4 +- arch/sh/include/asm/pgtable.h | 8 ---- arch/sh/include/asm/setup.h | 3 +- arch/sh/kernel/head_32.S | 4 +- arch/sh/kernel/sh_ksyms_32.c | 1 - arch/sh/mm/init.c | 1 - arch/sparc/include/asm/pgtable_32.h | 8 ---- arch/sparc/include/asm/pgtable_64.h | 3 -- arch/sparc/include/asm/setup.h | 2 - arch/sparc/kernel/head_32.S | 7 ---- arch/sparc/mm/init_32.c | 4 -- arch/sparc/mm/init_64.c | 24 +++++------- arch/um/include/asm/pgtable.h | 9 ----- arch/um/include/shared/kern_util.h | 1 - arch/um/kernel/mem.c | 16 -------- arch/um/kernel/um_arch.c | 1 - arch/x86/include/asm/pgtable.h | 8 ---- arch/x86/kernel/head_32.S | 4 -- arch/x86/kernel/head_64.S | 7 ---- arch/x86/kvm/mmu/spte.h | 2 +- arch/xtensa/include/asm/pgtable.h | 4 -- arch/xtensa/kernel/head.S | 3 -- arch/xtensa/kernel/xtensa_ksyms.c | 2 - fs/dax.c | 2 +- fs/proc/vmcore.c | 2 +- include/linux/pgtable.h | 48 ++++++++++++++--------- mm/huge_memory.c | 2 +- mm/memory.c | 15 +------ mm/migrate.c | 2 +- mm/mm_init.c | 28 +++++++++++++ mm/userfaultfd.c | 4 +- 70 files changed, 86 insertions(+), 354 deletions(-) base-commit: 50c7f34c5c7403a12003c6759f6f6ca9a5a10872 -- 2.51.0
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