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AJvYcCUrAH8mPuyJKbFFxCCggSJk12R6CMmiYnL0EJBnzyfFwvld1TIY5fga056r0fnC1y/r0n7lL+rsaw==@kvack.org X-Gm-Message-State: AOJu0YxtNQMrcGMX04glsvs9ozEhThRpnOKwSP5CQ1/da9iwvhzF4C2c 7fclAGm9uluMWGJ/+yiEBN1cPRZ9RLWLgHJgapQKnGL3VN1tJtylLwEpqGvB+aaccemB233C6kk ANU5eqMMzdhcTZUV9YU2gzb1fv8OfUCk= X-Gm-Gg: AY/fxX5Yopz795IlAmaSVM+JXAWtlaMswrt6pQn29Bvs0qlxo2It0Bic4avLi+0F6Zz GOL7j6tSQxbx8O/9G9Z5FS3o8m16arx23G431FkS5yS30hWso4LG0/Y4Xr2z47A6oCbj75gs2FO 7Unr05jB7p+ZD9Zn16Ooy4Dk2BHmEZfmOuX4drO8jqybqOOVHNE7Vwz2Sxw+sQpUPNdE+B/SuoK MRyhmiyDvR06Lzlvp5SXBLcEvHAKvss4RMk17+2tNKYn2ti67dx0SXIRnzKvur1PCfDR8NJ X-Google-Smtp-Source: AGHT+IFWPXcZKnGq0Krk9SV9S7c2h0pNtpTmEWv1Brc1vDiv5zIRm5JUQPWxix5qBNEZM9fT8eFcchz/mGnlgfTZ7QQ= X-Received: by 2002:a05:6402:430d:b0:64d:170:7976 with SMTP id 4fb4d7f45d1cf-64d01707bacmr33060451a12.16.1767196183052; Wed, 31 Dec 2025 07:49:43 -0800 (PST) MIME-Version: 1.0 References: <20251228124001.3624742-1-rppt@kernel.org> <20251228124001.3624742-2-rppt@kernel.org> In-Reply-To: <20251228124001.3624742-2-rppt@kernel.org> From: Magnus Lindholm Date: Wed, 31 Dec 2025 16:49:31 +0100 X-Gm-Features: AQt7F2rayRHt2K_8t_heYN2h4Fxse0t-QPEGBzoKWlAlrWu2fr6sWsAyLE9oYEU Message-ID: Subject: Re: [PATCH 01/28] alpha: introduce arch_zone_limits_init() To: Mike Rapoport Cc: Andrew Morton , 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 , Matt Turner , Max Filippov , Michael Ellerman , Michal Hocko , Michal Simek , 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 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: 039F2C000E X-Stat-Signature: 9xziuw3tsowbkyuef75yxax58jjd35fw X-Rspam-User: X-Rspamd-Server: rspam06 X-HE-Tag: 1767196184-519492 X-HE-Meta: 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 zXu0q1Wd hGFLFO9RCAIZhNbJkuwBAT18PvaiYdYTGzOppTIydwWMPc+6t/KT7AAdrTXyK4Xi2cklRA//pSBHUbi0aMTcAIKNqpiLSFKAd3qdTbb19TEmThgHrXaPiIxwHWnKTVCcq3eWWQ4mI4oEL7tFY7r+lgWOw1Mo5A5s1RY3hvCPT/tjsDsydTjw/qEZKackk2PaONPjXjxTtb/ge6g5cjbu8cjUDeNa96UIgeKFiHHNN9sTg3bdJC3Nmef7+9ph/RBUY6khqvMxXyfaIo3dM039PoOzh05DKkXbGVpvsCtcTI4H1vMkyoLOa6UK1ra5GD10QOy7LfyIu3+luuLEIbOMJzM92YYFtVhZzhD5+9LSaV4NUTNGyvNKov2SuwetDnNrD/yL8d/Zt1K7k9bZhPivvJZ8KDmT49U1aj1GewlzYYbQ78rTVdqvQgEd85qB9NkqRlNmUbMd7DbcR7NwSFzYF9fV3oj0NDqQL+NhHI80X5jG1svU= 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: On Sun, Dec 28, 2025 at 1:40=E2=80=AFPM Mike Rapoport wro= te: > > 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/alpha/mm/init.c | 15 ++++++++++----- > include/linux/mm.h | 1 + > 2 files changed, 11 insertions(+), 5 deletions(-) > > diff --git a/arch/alpha/mm/init.c b/arch/alpha/mm/init.c > index 4c5ab9cd8a0a..cd0cb1abde5f 100644 > --- a/arch/alpha/mm/init.c > +++ b/arch/alpha/mm/init.c > @@ -208,12 +208,8 @@ callback_init(void * kernel_end) > return kernel_end; > } > > -/* > - * paging_init() sets up the memory map. > - */ > -void __init paging_init(void) > +void __init arch_zone_limits_init(unsigned long *max_zone_pfn) > { > - unsigned long max_zone_pfn[MAX_NR_ZONES] =3D {0, }; > unsigned long dma_pfn; > > dma_pfn =3D virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT; > @@ -221,8 +217,17 @@ void __init paging_init(void) > > max_zone_pfn[ZONE_DMA] =3D dma_pfn; > max_zone_pfn[ZONE_NORMAL] =3D max_pfn; > +} > + > +/* > + * paging_init() sets up the memory map. > + */ > +void __init paging_init(void) > +{ > + unsigned long max_zone_pfn[MAX_NR_ZONES] =3D {0, }; > > /* Initialize mem_map[]. */ > + arch_zone_limits_init(max_zone_pfn); > free_area_init(max_zone_pfn); > > /* Initialize the kernel's ZERO_PGE. */ > diff --git a/include/linux/mm.h b/include/linux/mm.h > index 15076261d0c2..628c0e0ac313 100644 > --- a/include/linux/mm.h > +++ b/include/linux/mm.h > @@ -3552,6 +3552,7 @@ static inline unsigned long get_num_physpages(void) > * free_area_init(max_zone_pfns); > */ > void free_area_init(unsigned long *max_zone_pfn); > +void arch_zone_limits_init(unsigned long *max_zone_pfn); > unsigned long node_map_pfn_alignment(void); > extern unsigned long absent_pages_in_range(unsigned long start_pfn, > unsigned long end_pfn); > -- > 2.51.0 > This looks fine to me from the Alpha side. Acked-by: Magnus Lindholm