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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 v2 02/28] arc: introduce arch_zone_limits_init() Date: Fri, 2 Jan 2026 08:59:38 +0200 Message-ID: <20260102070005.65328-3-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-Stat-Signature: y8ispxz543p4u1deqnsh8x7ixusuzkdy X-Rspam-User: X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 2EB534000B X-HE-Tag: 1767337254-564715 X-HE-Meta: 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 lRZ3m5vU qRZdi3Jh8vbwIDXF7pvj6VeuHU117EMizjWnt9hD42dJ9TJWknwywBcuGt0Yd0O1AxKrGLv0wO407c1j8h0qfV8pgDuaKjadV4d+fuwYUt4vIkYuNsQk9/lDJc1b92WBOaR4G02TQJRwERNQN5xh3X2Dsz/dhuS+7V9OO/gINO0Qiv7Z+QbFm/z0zW8pAXYl4coGIZDztawyXlj0cTciwJ//fVbrBqqAkup+bnamB2YXI16UZ1Z5b+A7evtdp+r6N8LfoAudSvC/nTH1C7JrN+kSM/Q== 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