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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 02/28] arc: introduce arch_zone_limits_init() Date: Sun, 28 Dec 2025 14:39:32 +0200 Message-ID: <20251228124001.3624742-3-rppt@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251228124001.3624742-1-rppt@kernel.org> References: <20251228124001.3624742-1-rppt@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Queue-Id: 6925780008 X-Rspamd-Server: rspam10 X-Stat-Signature: 3k9it55jmphs9p6wqosbrntpe6nnfz31 X-HE-Tag: 1766925652-701950 X-HE-Meta: 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 8uvV9tsM pJazZK5L6qB2/gF2tVruXV9aEDxxVahKtva/KpYTRbUAgFq+6PsA3PE2UXH/SbGbbOOC8tlEx6NJP6TE9TTK8zuPRVUYG92B/FL/iID0m7Mbn1HXkNqKxhffSd0GoBD8Eo5kPIC2otYoLaTpJa28DoxRRQiWIwyAe5+SdQsvvQQEvbe3oNVRDtPPSvRlF8F2Lhgced2+mxfhVwMSVw8e0+jWQhBTTK9rRiwlv62kKImSrwrCK8+CnEd/HzPT7MStcAffdEOwsrNKRTbe+7rQ9l1SSOw== 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/arc/mm/init.c | 34 ++++++++++++++++++++-------------- 1 file changed, 20 insertions(+), 14 deletions(-) diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c index a73cc94f806e..ff7974d38011 100644 --- a/arch/arc/mm/init.c +++ b/arch/arc/mm/init.c @@ -75,6 +75,25 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size) base, TO_MB(size), !in_use ? "Not used":""); } +void __init arch_zone_limits_init(unsigned long *max_zone_pfn) +{ + /*----------------- node/zones setup --------------------------*/ + max_zone_pfn[ZONE_NORMAL] = max_low_pfn; + +#ifdef CONFIG_HIGHMEM + /* + * max_high_pfn should be ok here for both HIGHMEM and HIGHMEM+PAE. + * For HIGHMEM without PAE max_high_pfn should be less than + * min_low_pfn to guarantee that these two regions don't overlap. + * For PAE case highmem is greater than lowmem, so it is natural + * to use max_high_pfn. + * + * In both cases, holes should be handled by pfn_valid(). + */ + max_zone_pfn[ZONE_HIGHMEM] = max_high_pfn; +#endif +} + /* * First memory setup routine called from setup_arch() * 1. setup swapper's mm @init_mm @@ -122,9 +141,6 @@ void __init setup_arch_memory(void) memblock_dump_all(); - /*----------------- node/zones setup --------------------------*/ - max_zone_pfn[ZONE_NORMAL] = max_low_pfn; - #ifdef CONFIG_HIGHMEM /* * On ARC (w/o PAE) HIGHMEM addresses are actually smaller (0 based) @@ -139,21 +155,11 @@ void __init setup_arch_memory(void) min_high_pfn = PFN_DOWN(high_mem_start); max_high_pfn = PFN_DOWN(high_mem_start + high_mem_sz); - /* - * max_high_pfn should be ok here for both HIGHMEM and HIGHMEM+PAE. - * For HIGHMEM without PAE max_high_pfn should be less than - * min_low_pfn to guarantee that these two regions don't overlap. - * For PAE case highmem is greater than lowmem, so it is natural - * to use max_high_pfn. - * - * In both cases, holes should be handled by pfn_valid(). - */ - max_zone_pfn[ZONE_HIGHMEM] = max_high_pfn; - arch_pfn_offset = min(min_low_pfn, min_high_pfn); kmap_init(); #endif /* CONFIG_HIGHMEM */ + arch_zone_limits_init(max_zone_pfn); free_area_init(max_zone_pfn); } -- 2.51.0