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 4FC5DE9410B for ; Fri, 2 Jan 2026 07:03:49 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id BA1A36B00A9; Fri, 2 Jan 2026 02:03:48 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id B800E6B00AB; Fri, 2 Jan 2026 02:03:48 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A8F536B00AC; Fri, 2 Jan 2026 02:03:48 -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 998446B00A9 for ; Fri, 2 Jan 2026 02:03:48 -0500 (EST) Received: from smtpin02.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 6C0641A86BF for ; Fri, 2 Jan 2026 07:03:48 +0000 (UTC) X-FDA: 84286133736.02.BFCAC3D Received: from sea.source.kernel.org (sea.source.kernel.org [172.234.252.31]) by imf05.hostedemail.com (Postfix) with ESMTP id BF3DA100006 for ; Fri, 2 Jan 2026 07:03:46 +0000 (UTC) Authentication-Results: imf05.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=WXMa09yB; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf05.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=1767337426; a=rsa-sha256; cv=none; b=Y1sFFeFSC214xvWx8p2d86PVkcg+uCNeGtrWuGpaNkmP/EeYtAv6tW2V1qylbBhpfD+A4N e/QZ8MCTWN8eVl+BaIWqXYQzuyisCnHXjdsPq0HyaSCUVRWC/FwPeUlyd3HTa/muxltZWl wbm+aKje2/JQk+YiKfsuL1lh3uoCrL0= ARC-Authentication-Results: i=1; imf05.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=WXMa09yB; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf05.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=1767337426; 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=0zKPan3W2SiqdNPRYPzd7IYJCfxuO94gDNri2EQoJXk=; b=PRJ65dPDo/CCapHW8+U4lGJV9i6N9wlMMet3fCC/6n6mwdcmx8725atZxLR6CJ0XztA2uK bNlyHgn9b2raV6LnM2QNNc8UHWe50aNPPp6Hxt5VLrbIDC7WGk0xd3aetq4ZFqfFSLlEbw R3baVe6KyXC9iW6Wiw40qq/d/J1Vqc8= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id D8AE543386; Fri, 2 Jan 2026 07:03:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DC80EC116B1; Fri, 2 Jan 2026 07:03:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767337425; bh=7cRQHQcJTxCSxc9tvl2G7dMvx0rutizHF89BihPwSeg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WXMa09yBg0tSjYHq9f9IeN1blNFAUX5LPbmAcZXTIcLFIhw3wDjAOleJmx/F17HYv DR/XhO43ZicM0ZzN/IylLOlc6TIvzzYw30yLyImZYlnIZOkfgkXLPeKS3KmqjXhef6 7Xqozq3RTQUIwv95IOKdrcgqsq7QTcmppbXQJr2NFgNTpEMaAaxVrHTWJemz62cI0e EI+nC09iXbdxet8WSVPNLPNmYPWpC8MthdMNGYVSvRQn8uLJUVipftJdPEOnMLgFJC Ffthwjks+FE6Yu/bSgN4+CtYSegAgdS1XujRR8oHw2GikpOK4R9aMTfMNz2zM8aM6W fysQUznA4UdgQ== 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 14/28] powerpc: introduce arch_zone_limits_init() Date: Fri, 2 Jan 2026 08:59:50 +0200 Message-ID: <20260102070005.65328-15-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-Rspamd-Queue-Id: BF3DA100006 X-Stat-Signature: zndexaz3rheu6h85wpwcqprgy9ke1ysz X-Rspam-User: X-Rspamd-Server: rspam06 X-HE-Tag: 1767337426-899824 X-HE-Meta: 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 eC+8tWPt FrijzXnpM424kxgzC6zF636br2H+2zqFiOaJIb1BYHG6/apWx2kMg7TLlLbHfXUNaF0r9OaoNullyXeJAyVC0afHSR1VH+S9otqWXmuvd8B/4e6zzJ+njsMG1CxmUlbUsNb8dT9L2ZXt0j/vlNBycXI74dB8zlg45R4lBCVt9UWKC4J/JhA8M69IlYMb8pN0uKRq+ZS4hhyUPBsiveIA3oWyH34kDD8mFtEeO57cZOhY0FGsaq+GLnQEWqQNkVUU+jNoNggtEu27tLfjRe8eoCu0HLQ== 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. Signed-off-by: Mike Rapoport (Microsoft) --- arch/powerpc/mm/mem.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index 3ddbfdbfa941..32c496bfab4f 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -221,13 +221,23 @@ static int __init mark_nonram_nosave(void) * anyway) will take a first dip into ZONE_NORMAL and get otherwise served by * ZONE_DMA. */ -static unsigned long max_zone_pfns[MAX_NR_ZONES]; +void __init arch_zone_limits_init(unsigned long *max_zone_pfns) +{ +#ifdef CONFIG_ZONE_DMA + max_zone_pfns[ZONE_DMA] = min(zone_dma_limit, max_low_pfn - 1) + 1; +#endif + max_zone_pfns[ZONE_NORMAL] = max_low_pfn; +#ifdef CONFIG_HIGHMEM + max_zone_pfns[ZONE_HIGHMEM] = max_pfn; +#endif +} /* * paging_init() sets up the page tables - in fact we've already done this. */ void __init paging_init(void) { + unsigned long max_zone_pfns[MAX_NR_ZONES]; unsigned long long total_ram = memblock_phys_mem_size(); phys_addr_t top_of_ram = memblock_end_of_DRAM(); int zone_dma_bits; @@ -259,15 +269,7 @@ void __init paging_init(void) zone_dma_limit = DMA_BIT_MASK(zone_dma_bits); -#ifdef CONFIG_ZONE_DMA - max_zone_pfns[ZONE_DMA] = min(max_low_pfn, - 1UL << (zone_dma_bits - PAGE_SHIFT)); -#endif - max_zone_pfns[ZONE_NORMAL] = max_low_pfn; -#ifdef CONFIG_HIGHMEM - max_zone_pfns[ZONE_HIGHMEM] = max_pfn; -#endif - + arch_zone_limits_init(max_zone_pfns); free_area_init(max_zone_pfns); mark_nonram_nosave(); -- 2.51.0