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 3C4D5EEB57A for ; Fri, 2 Jan 2026 07:02:23 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id A34606B009E; Fri, 2 Jan 2026 02:02:22 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 9FF216B00A0; Fri, 2 Jan 2026 02:02:22 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 901BA6B00A1; Fri, 2 Jan 2026 02:02:22 -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 7C0AA6B009E for ; Fri, 2 Jan 2026 02:02:22 -0500 (EST) Received: from smtpin13.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay04.hostedemail.com (Postfix) with ESMTP id 533D71A0376 for ; Fri, 2 Jan 2026 07:02:22 +0000 (UTC) X-FDA: 84286130124.13.697BAD3 Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf16.hostedemail.com (Postfix) with ESMTP id 9FEF2180005 for ; Fri, 2 Jan 2026 07:02:20 +0000 (UTC) Authentication-Results: imf16.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=YgVfRMOP; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf16.hostedemail.com: domain of rppt@kernel.org designates 172.234.252.31 as permitted sender) smtp.mailfrom=rppt@kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1767337340; a=rsa-sha256; cv=none; b=xbtjlFKydvitCZfIVx1q9DTFV3+pD/fn1gJgtw9abXkJgoFrHiiGCJ37leM13OXbZqgXCH DvR/TgBxRss/ur9R/lJQJ8qgRVS7qLW/2Y7zNs1df7+h4tlrNVo2i1kOevqDfW2hVaKDGL nk6mWOl3gROiPCbh8FfwHUhVonSMZ0k= ARC-Authentication-Results: i=1; imf16.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=YgVfRMOP; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf16.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=1767337340; 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:in-reply-to:references:references:dkim-signature; bh=OJatOTiXEPNp/W52LlXUaW1EIsFN/BNV7MmBuJg1xZQ=; b=BUdF3AZ1E9Y+gX67YR/JQszo8yHf+kZd2kkv+SMMTWrB5jDBIh8vg1m0X0jS/Ame2s3FfX Un8YXYk5hUBeNi4uB6YZbV5UPInm/lWUtjSo5+7DzC/UdbTr4DoR+dA6foKt/6z2A+Nxut 7dUXkblNpnerHEXhh7qXJzddEXQDF9E= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id B5C4D417BC; Fri, 2 Jan 2026 07:02:19 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B5C2DC19422; Fri, 2 Jan 2026 07:02:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767337339; bh=qGV3crV7vYfN1DCsmhF37VWmOXuApg3MmNmGXJVotqE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YgVfRMOPs1HT136LQlxti3CjGqTiAYYJHHhtujbmeeW9b5Sp1uzqGIqNcaFKtEYaD gUmONK9l5FeSIrhyFOIzw67O8yh8iZKtBESs03lQBObKmxcbhraIYFS3aMlk9cEYI7 UQZCAbWMn28QX2knHvCNY0hoM7rRnorxLD1hUlMhn4nvfhTTDVvqdCBfWuLVwntHPn D3vo7BUCLsuI0NFNIALchXt/QJhsX/uYfd5qmIcvxrNCz/vI6hg+EVI9NGaui2qCrN wI/OqtpL8AlxnLMhaisftFHIoT2W/7a7/Vyg9nZsG6O2ocQDHVkFf36gQ0LssTm0rp 3nnspmYHu59yA== From: Mike Rapoport To: Andrew Morton Cc: Alex Shi , Alexander Gordeev , Andreas Larsson , Borislav Petkov , Brian Cain , "Christophe Leroy (CS GROUP)" , Catalin Marinas , "David S. Miller" , Dave Hansen , David Hildenbrand , Dinh Nguyen , Geert Uytterhoeven , Guo Ren , Heiko Carstens , Helge Deller , Huacai Chen , Ingo Molnar , Johannes Berg , John Paul Adrian Glaubitz , Jonathan Corbet , "Liam R. Howlett" , Lorenzo Stoakes , Magnus Lindholm , Matt Turner , Max Filippov , Michael Ellerman , Michal Hocko , Michal Simek , Mike Rapoport , Muchun Song , Oscar Salvador , Palmer Dabbelt , Pratyush Yadav , Richard Weinberger , Russell King , Stafford Horne , Suren Baghdasaryan , Thomas Bogendoerfer , Thomas Gleixner , Vasily Gorbik , Vineet Gupta , Vlastimil Babka , Will Deacon , x86@kernel.org, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-cxl@vger.kernel.org, linux-doc@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-openrisc@vger.kernel.org, linux-parisc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-um@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, loongarch@lists.linux.dev, sparclinux@vger.kernel.org Subject: [PATCH v2 08/28] m68k: introduce arch_zone_limits_init() Date: Fri, 2 Jan 2026 08:59:44 +0200 Message-ID: <20260102070005.65328-9-rppt@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260102070005.65328-1-rppt@kernel.org> References: <20260102070005.65328-1-rppt@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Queue-Id: 9FEF2180005 X-Rspamd-Server: rspam10 X-Stat-Signature: mfjkzk5ao8yax18s9xhg41h8ekrth551 X-HE-Tag: 1767337340-280740 X-HE-Meta: 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 E/3oJFz4 KrVI/cVjy8U+PdMmlh9ZIJejHcayjS3PSffzzlPmxb5MgN4EG4TF/jgZSZqxokuXjLehY+1igy6CQjzjAoRQLvmpbLeaYPRVJxcLNL1gZtHyauLuzsy1SuM6lCM4jNp1eXRRz5VwmvZDt06PrXJj8pCxl3bJLtBskASt5OJZNvmjxx3OMFFDMEq10B+6quc403WjKWSL0Z50MU0RBElDqIzxBxYrnbAuOGvhJHEYYyoYd5nIOPTKSbIC8nyllkdcBUA5U6ExhIjjJaVQNv8ms9/yJQg== 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)" Move calculations of zone limits to a dedicated arch_zone_limits_init() function. Later MM core will use this function as an architecture specific callback during nodes and zones initialization and thus there won't be a need to call free_area_init() from every architecture. Since all variants of m68k add all memory to ZONE_DMA, it is possible to use unified implementation for arch_zone_limits_init() that sets the end of ZONE_DMA to memblock_end_of_DRAM(). Signed-off-by: Mike Rapoport (Microsoft) --- arch/m68k/mm/init.c | 7 ++++++- arch/m68k/mm/mcfmmu.c | 2 +- arch/m68k/mm/motorola.c | 2 +- arch/m68k/mm/sun3mmu.c | 2 +- 4 files changed, 9 insertions(+), 4 deletions(-) diff --git a/arch/m68k/mm/init.c b/arch/m68k/mm/init.c index 488411af1b3f..6b1d9d2434b5 100644 --- a/arch/m68k/mm/init.c +++ b/arch/m68k/mm/init.c @@ -40,6 +40,11 @@ void *empty_zero_page; EXPORT_SYMBOL(empty_zero_page); +void __init arch_zone_limits_init(unsigned long *max_zone_pfns) +{ + max_zone_pfns[ZONE_DMA] = PFN_DOWN(memblock_end_of_DRAM()); +} + #ifdef CONFIG_MMU int m68k_virt_to_node_shift; @@ -69,7 +74,7 @@ void __init paging_init(void) high_memory = (void *) end_mem; empty_zero_page = memblock_alloc_or_panic(PAGE_SIZE, PAGE_SIZE); - max_zone_pfn[ZONE_DMA] = end_mem >> PAGE_SHIFT; + arch_zone_limits_init(max_zone_pfn); free_area_init(max_zone_pfn); } diff --git a/arch/m68k/mm/mcfmmu.c b/arch/m68k/mm/mcfmmu.c index 19a75029036c..24a6f7bbd1ce 100644 --- a/arch/m68k/mm/mcfmmu.c +++ b/arch/m68k/mm/mcfmmu.c @@ -73,7 +73,7 @@ void __init paging_init(void) } current->mm = NULL; - max_zone_pfn[ZONE_DMA] = PFN_DOWN(_ramend); + arch_zone_limits_init(max_zone_pfn); free_area_init(max_zone_pfn); } diff --git a/arch/m68k/mm/motorola.c b/arch/m68k/mm/motorola.c index 62283bc2ed79..d6ccd23caf61 100644 --- a/arch/m68k/mm/motorola.c +++ b/arch/m68k/mm/motorola.c @@ -517,6 +517,6 @@ void __init paging_init(void) if (node_present_pages(i)) node_set_state(i, N_NORMAL_MEMORY); - max_zone_pfn[ZONE_DMA] = memblock_end_of_DRAM(); + arch_zone_limits_init(max_zone_pfn); free_area_init(max_zone_pfn); } diff --git a/arch/m68k/mm/sun3mmu.c b/arch/m68k/mm/sun3mmu.c index 1ecf6bdd08bf..fdd69cc4240c 100644 --- a/arch/m68k/mm/sun3mmu.c +++ b/arch/m68k/mm/sun3mmu.c @@ -82,7 +82,7 @@ void __init paging_init(void) current->mm = NULL; /* memory sizing is a hack stolen from motorola.c.. hope it works for us */ - max_zone_pfn[ZONE_DMA] = ((unsigned long)high_memory) >> PAGE_SHIFT; + arch_zone_limits_init(max_zone_pfn); /* I really wish I knew why the following change made things better... -- Sam */ free_area_init(max_zone_pfn); -- 2.51.0