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GET /api/1.2/patches/2219954/?format=api
{ "id": 2219954, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2219954/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260405125240.2558577-30-songmuchun@bytedance.com/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/1.2/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/", "list_archive_url_format": "https://lore.kernel.org/linuxppc-dev/{}/", "commit_url_format": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}" }, "msgid": "<20260405125240.2558577-30-songmuchun@bytedance.com>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20260405125240.2558577-30-songmuchun@bytedance.com/", "date": "2026-04-05T12:52:20", "name": "[29/49] mm: extract pfn_to_zone() helper", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "9f4495cdcb4e974cafbc171dbbf72ec8c4869698", "submitter": { "id": 78930, "url": "http://patchwork.ozlabs.org/api/1.2/people/78930/?format=api", "name": "Muchun Song", "email": "songmuchun@bytedance.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260405125240.2558577-30-songmuchun@bytedance.com/mbox/", "series": [ { "id": 498783, "url": "http://patchwork.ozlabs.org/api/1.2/series/498783/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=498783", "date": "2026-04-05T12:51:51", "name": "mm: Generalize vmemmap optimization for DAX and HugeTLB", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/498783/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2219954/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2219954/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-19359-incoming=patchwork.ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=bytedance.com header.i=@bytedance.com\n header.a=rsa-sha256 header.s=google header.b=aPmGIggU;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; 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Howlett\" <Liam.Howlett@oracle.com>,\n\tVlastimil Babka <vbabka@kernel.org>,\n\tMike Rapoport <rppt@kernel.org>,\n\tSuren Baghdasaryan <surenb@google.com>,\n\tMichal Hocko <mhocko@suse.com>,\n\tNicholas Piggin <npiggin@gmail.com>,\n\tChristophe Leroy <chleroy@kernel.org>,\n\taneesh.kumar@linux.ibm.com,\n\tjoao.m.martins@oracle.com,\n\tlinux-mm@kvack.org,\n\tlinuxppc-dev@lists.ozlabs.org,\n\tlinux-kernel@vger.kernel.org,\n\tMuchun Song <songmuchun@bytedance.com>", "Subject": "[PATCH 29/49] mm: extract pfn_to_zone() helper", "Date": "Sun, 5 Apr 2026 20:52:20 +0800", "Message-Id": "<20260405125240.2558577-30-songmuchun@bytedance.com>", "X-Mailer": "git-send-email 2.20.1", "In-Reply-To": "<20260405125240.2558577-1-songmuchun@bytedance.com>", "References": "<20260405125240.2558577-1-songmuchun@bytedance.com>", "X-Mailing-List": "linuxppc-dev@lists.ozlabs.org", "List-Id": "<linuxppc-dev.lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev+help@lists.ozlabs.org>", "List-Owner": "<mailto:linuxppc-dev+owner@lists.ozlabs.org>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Archive": "<https://lore.kernel.org/linuxppc-dev/>,\n <https://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Subscribe": "<mailto:linuxppc-dev+subscribe@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-digest@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-nomail@lists.ozlabs.org>", "List-Unsubscribe": "<mailto:linuxppc-dev+unsubscribe@lists.ozlabs.org>", "Precedence": "list", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Spam-Status": "No, score=-0.2 required=3.0 tests=DKIM_SIGNED,DKIM_VALID,\n\tDKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS\n\tautolearn=disabled version=4.0.1 OzLabs 8", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org" }, "content": "Extract pfn_to_zone() from sparse-vmemmap.c to mm_init.c and use it\nin __init_page_from_nid(). This removes duplicated code for finding\nthe zone for a given PFN.\n\nSigned-off-by: Muchun Song <songmuchun@bytedance.com>\n---\n mm/internal.h | 1 +\n mm/mm_init.c | 28 ++++++++++++++++------------\n mm/sparse-vmemmap.c | 14 --------------\n 3 files changed, 17 insertions(+), 26 deletions(-)", "diff": "diff --git a/mm/internal.h b/mm/internal.h\nindex 27c06250d6b8..b569d8309f4d 100644\n--- a/mm/internal.h\n+++ b/mm/internal.h\n@@ -1350,6 +1350,7 @@ static inline bool deferred_pages_enabled(void)\n }\n #endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */\n \n+struct zone *pfn_to_zone(unsigned long pfn, int nid);\n void init_deferred_page(unsigned long pfn, int nid);\n \n enum mminit_level {\ndiff --git a/mm/mm_init.c b/mm/mm_init.c\nindex b47f65425bc1..e47d08b63154 100644\n--- a/mm/mm_init.c\n+++ b/mm/mm_init.c\n@@ -687,24 +687,28 @@ static __meminit void pageblock_migratetype_init_range(unsigned long pfn,\n \t}\n }\n \n+struct zone __meminit *pfn_to_zone(unsigned long pfn, int nid)\n+{\n+\tpg_data_t *pgdat = NODE_DATA(nid);\n+\n+\tfor (enum zone_type zone_type = 0; zone_type < MAX_NR_ZONES; zone_type++) {\n+\t\tstruct zone *zone = &pgdat->node_zones[zone_type];\n+\n+\t\tif (zone_spans_pfn(zone, pfn))\n+\t\t\treturn zone;\n+\t}\n+\n+\treturn NULL;\n+}\n+\n #ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT\n /*\n * Initialize a reserved page unconditionally, finding its zone first.\n */\n static void __meminit __init_page_from_nid(unsigned long pfn, int nid)\n {\n-\tpg_data_t *pgdat;\n-\tint zid;\n-\n-\tpgdat = NODE_DATA(nid);\n-\n-\tfor (zid = 0; zid < MAX_NR_ZONES; zid++) {\n-\t\tstruct zone *zone = &pgdat->node_zones[zid];\n-\n-\t\tif (zone_spans_pfn(zone, pfn))\n-\t\t\tbreak;\n-\t}\n-\t__init_single_page(pfn_to_page(pfn), pfn, zid, nid);\n+\t__init_single_page(pfn_to_page(pfn), pfn,\n+\t\t\t zone_idx(pfn_to_zone(pfn, nid)), nid);\n \n \tif (pageblock_aligned(pfn))\n \t\tinit_pageblock_migratetype(pfn_to_page(pfn), MIGRATE_MOVABLE,\ndiff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c\nindex d266bcf45b5c..9da49b0d03f0 100644\n--- a/mm/sparse-vmemmap.c\n+++ b/mm/sparse-vmemmap.c\n@@ -143,20 +143,6 @@ void __meminit vmemmap_verify(pte_t *pte, int node,\n \t\t\tstart, end - 1);\n }\n \n-static struct zone __meminit *pfn_to_zone(unsigned long pfn, int nid)\n-{\n-\tpg_data_t *pgdat = NODE_DATA(nid);\n-\n-\tfor (enum zone_type zone_type = 0; zone_type < MAX_NR_ZONES; zone_type++) {\n-\t\tstruct zone *zone = &pgdat->node_zones[zone_type];\n-\n-\t\tif (zone_spans_pfn(zone, pfn))\n-\t\t\treturn zone;\n-\t}\n-\n-\treturn NULL;\n-}\n-\n static __meminit struct page *vmemmap_get_tail(unsigned int order, struct zone *zone);\n \n static pte_t * __meminit vmemmap_pte_populate(pmd_t *pmd, unsigned long addr, int node,\n", "prefixes": [ "29/49" ] }