From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E7FF9E81BCF for ; Mon, 9 Feb 2026 14:41:17 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 558766B008A; Mon, 9 Feb 2026 09:41:17 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 539C76B00AF; Mon, 9 Feb 2026 09:41:17 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 459186B00B0; Mon, 9 Feb 2026 09:41:17 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id 345476B008A for ; Mon, 9 Feb 2026 09:41:17 -0500 (EST) Received: from smtpin17.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay05.hostedemail.com (Postfix) with ESMTP id D4EA65628B for ; Mon, 9 Feb 2026 14:41:16 +0000 (UTC) X-FDA: 84425180952.17.A6D7F7B Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf14.hostedemail.com (Postfix) with ESMTP id 4F736100003 for ; Mon, 9 Feb 2026 14:41:15 +0000 (UTC) Authentication-Results: imf14.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=lNIMGaab; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf14.hostedemail.com: domain of rppt@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=rppt@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1770648075; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:references:dkim-signature; bh=KaemXTxQHMv9bpHkXsnfD0HaSN9qgB8hHzbd7NEhoKk=; b=8ECwhLGmKC58+kD7Krz/6X0whYK/p8Xalfxuf66MXcCSOOwNLqM2v1+XLn7yDoq/HLNfQ6 oG2NCPVB09IBSbvtR3InhCWQhbVTwW7kdD2fyXFMO4h8dqvTDV228glKSulB+8Hosj/J60 inDpLVMheNtiuoCSu2G9TEQCKG79LRw= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1770648075; a=rsa-sha256; cv=none; b=4Xj10WVt6cJrsrp5fjnP9YJbd/lYiNR61ydxK5tiJMScaLvO+HpV6Q9/1OhC+ZuoY2Cx14 9twtoPlEF78gIIEVjKP1qlA6mkAV/k1usurIzKO8HSbn1r9yLvSf0IgF9ZF7BjtKEOlE0y Hi42IZtUA8swRO7cCNetj0/+OB9aNeU= ARC-Authentication-Results: i=1; imf14.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=lNIMGaab; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf14.hostedemail.com: domain of rppt@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=rppt@kernel.org Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 75B9543BD8; Mon, 9 Feb 2026 14:41:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 803B4C19422; Mon, 9 Feb 2026 14:41:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1770648074; bh=B2mkA4JyLV5P+26Kji7kOaADSMAhZAUHx96+BlD9dVA=; h=From:To:Cc:Subject:Date:From; b=lNIMGaabE0qBHyKmiQQ82ePHeKOk12FZcvy7uIhl99+FK8xY+dvBmwJnHq448tgU5 yWCM6YFfxDvwT1wI5+Rt+hhXZLLV4D0u0LeJHpDec1IByx2uLPHCfHaX3Y6XpJ+rsw JJVxqM5D44XNcn4x0x+Kh3J6eZihZBMhmxySUsLGosdfZbLuXcXqIysNK+I7TUQbg9 O8HeuEegeOHjXjoPICHlHeBzr1Z+8ulczKwGXjAXkwEVNlDEDH7KqeCc5+hLTfRZaH Codl9ykicppLg+KhR0t3MGY3QhvKdyqCU/tVEiccSKm1jaUu/OhlXAz7EKTzkg5T6F 18AZs0Gxi+VGg== From: Mike Rapoport To: Andrew Morton Cc: Andreas Larsson , Borislav Petkov , Brian Cain , Catalin Marinas , "Christophe Leroy (CS GROUP)" , "David S. Miller" , Dave Hansen , David Hildenbrand , Dinh Nguyen , Geert Uytterhoeven , Guo Ren , Helge Deller , Huacai Chen , Ingo Molnar , Johannes Berg , John Paul Adrian Glaubitz , "Liam R. Howlett" , Lorenzo Stoakes , Madhavan Srinivasan , Magnus Lindholm , Matt Turner , Max Filippov , Michael Ellerman , Michal Hocko , Michal Simek , Mike Rapoport , Palmer Dabbelt , Richard Weinberger , Russell King , Stafford Horne , Suren Baghdasaryan , Thomas Gleixner , Vineet Gupta , Vlastimil Babka , Will Deacon , linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-openrisc@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-mm@kvack.org, x86@kernel.org Subject: [PATCH v2 0/4] arch, mm: consolidate empty_zero_page Date: Mon, 9 Feb 2026 16:40:53 +0200 Message-ID: <20260209144058.2092871-1-rppt@kernel.org> X-Mailer: git-send-email 2.51.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 4F736100003 X-Stat-Signature: rumkihnyrgbc6dinz6nhwox5kqnrh5d3 X-Rspam-User: X-Rspamd-Server: rspam02 X-HE-Tag: 1770648075-533971 X-HE-Meta: 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 ftTaQQ2k mFnBZ X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: "Mike Rapoport (Microsoft)" 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