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 64559D25037 for ; Sun, 11 Jan 2026 08:23:43 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id A9B1C6B00A1; Sun, 11 Jan 2026 03:23:42 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id A728F6B00A3; Sun, 11 Jan 2026 03:23:42 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 954FC6B00A4; Sun, 11 Jan 2026 03:23:42 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 819F06B00A1 for ; Sun, 11 Jan 2026 03:23:42 -0500 (EST) Received: from smtpin02.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 22B0F1AC532 for ; Sun, 11 Jan 2026 08:23:42 +0000 (UTC) X-FDA: 84318994284.02.E3A344F Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf21.hostedemail.com (Postfix) with ESMTP id B444C1C0005 for ; Sun, 11 Jan 2026 08:23:40 +0000 (UTC) Authentication-Results: imf21.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=fxotzz0k; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf21.hostedemail.com: domain of rppt@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=rppt@kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1768119820; a=rsa-sha256; cv=none; b=Lvn0esaS5Aea6wmp8QESi29E5kt9SBmMS6eXyi1ZLwpaFzGCu2zo4HuB4W58NMI4p9HkbV j/5Sp3qiUbInGSRGurgAdNgxyMMkgGeiCn1GLmCnonOJ3OhB/A7Y556/IqqG4TwMhJp/Xr xaO0ODA6fHvbOzO4J0TolKZGyu0Ui2M= ARC-Authentication-Results: i=1; imf21.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=fxotzz0k; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf21.hostedemail.com: domain of rppt@kernel.org designates 172.105.4.254 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=1768119820; 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=lK0WalVfXj0Oc63RUrfrNjyITX2C0Py0aW9gtv0hflqrEdK7R0qrHQVrbCrU+mXBrk18ql eGzS31kHxTgL28KAqAy5LuTkU0o49Rv/8+cfc6wYwRBJVPnc50OJbh1owdidAOeAhCOy3T PCdjUQm6S8aH79W8ki/Mx9HuEb+4NrE= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 2B13F60122; Sun, 11 Jan 2026 08:23:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 41A52C4CEF7; Sun, 11 Jan 2026 08:23:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768119819; bh=qGV3crV7vYfN1DCsmhF37VWmOXuApg3MmNmGXJVotqE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fxotzz0k2KwCNp5gWh6cgEcUYH8E0BhaEKKXTdT2pUdivBywvI4T+qXqHxIZASCzv 1gDvHJBccnnzMaLHh7DBlSuaqDoWKk743xL7Oou07E6HNfZWS0zPTWLM4rs5OOguuo GUAoxRtqYBs/qxZg0L3WKkhSzJKWvFzo7bwsjWtl2FO4jLNuQVwJYrxBJFZgt1ghP2 0kdmI1lYTpCBQUUqGWKOjqYFpVyhQUuN851OKnj8uy6V7dRr5kMl9pPSzvbRlL8i0d I2u0gSIfQN5q/tcK4hqFkCMxPsVumAIFJF5vuk9i0Tc/89H6zAhA9SuDwA9yercaDb vOxbNKYOZaN5w== 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 , Klara Modin , "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 , Ritesh Harjani , 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 v3 09/29] m68k: introduce arch_zone_limits_init() Date: Sun, 11 Jan 2026 10:20:43 +0200 Message-ID: <20260111082105.290734-10-rppt@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260111082105.290734-1-rppt@kernel.org> References: <20260111082105.290734-1-rppt@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Stat-Signature: g74z3byewu8x1wpc6y1mj7dpnwjpnw95 X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: B444C1C0005 X-HE-Tag: 1768119820-940795 X-HE-Meta: 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 mPVOMepY BLdVB1x9rvWt02YCdoJgGgYpK0UDEQJ8+qj6Qivn8o+n0oeqFN7U67+hua5RADOW+RVX/9cqu99QHAUY= 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