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([110.9.142.4]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-38fb2962928sm3987415a91.3.2026.08.03.06.48.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Aug 2026 06:48:32 -0700 (PDT) From: Sang-Heon Jeon To: Andrew Morton , David Hildenbrand , Mike Rapoport , Vlastimil Babka Cc: Brendan Jackman , Johannes Weiner , "Liam R. Howlett" , linux-mm@kvack.org, Lorenzo Stoakes , Michal Hocko , Suren Baghdasaryan , Zi Yan Subject: [PATCH] mm/page_ext: remove pgdat_page_ext_init() Date: Mon, 3 Aug 2026 22:48:21 +0900 Message-ID: <20260803134822.2568766-1-ekffu200098@gmail.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 13E9F20006 X-Stat-Signature: 93y9i6eynbxkffe5mw9kq3e19o9tweun X-Rspam-User: X-HE-Tag: 1785764913-330702 X-HE-Meta: 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 GgSbM8Jw YOhFAvwhHJIPKX7T28iwjfDgIFhAmhSXSIDQHwqVa+Ecdy/9XPRmaBOEP1AzGb/XSOmYyj1ec9pBThRp2xjUPVRYyo/2ZuiP5LzcXw1fHH8HSJyzaqe0PwgHPMSgb7/CJ0yvttZGpid7uJgAQGdYEtmI7hJlKIvkuE3bj2uTBbK9996Xd/T8s3WJ2vVv55ZPUN45gp7wtHdCCwYeOxCPN/5Uo7CB+b3GrXvIDU2Yp1HKohwHARAZUyFT76xVwkPdO/fH/LY/Lkt4ob3UrHQPbe3gkgWamSydhN/UoQtmXeGqGgNE3RN4Bl0YOynF08ygCZuDfkFL3W6JF2Oo3nr5Auzs+2J4PvhOp4ZvGlXQtN4IaV35jH8DpBeucc1M9Xf73I3BOunEuknccIk+bu5Y7Wb1jsiPQLiHYDmTcqaWEzpu4FVJY9IHYLTZrorDHI2nXo6FvcyB5smgZcqc= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: pgdat_page_ext_init() sets pgdat->node_page_ext to NULL only on FLATMEM. FLATMEM depends on !NUMA on every architecture, so the pgdat is always the zero-initialized contig_page_data and the store has no effect. So remove the call site, the unused function and its declaration. No functional change. Signed-off-by: Sang-Heon Jeon --- include/linux/page_ext.h | 5 ----- mm/mm_init.c | 1 - mm/page_ext.c | 9 --------- 3 files changed, 15 deletions(-) diff --git a/include/linux/page_ext.h b/include/linux/page_ext.h index f23d4b218da0..79c53ec45dfa 100644 --- a/include/linux/page_ext.h +++ b/include/linux/page_ext.h @@ -55,7 +55,6 @@ struct page_ext { extern bool early_page_ext; extern unsigned long page_ext_size; -extern void pgdat_page_ext_init(struct pglist_data *pgdat); static inline bool early_page_ext_enabled(void) { @@ -202,10 +201,6 @@ static inline bool early_page_ext_enabled(void) return false; } -static inline void pgdat_page_ext_init(struct pglist_data *pgdat) -{ -} - static inline void page_ext_init(void) { } diff --git a/mm/mm_init.c b/mm/mm_init.c index 711f821f7b3c..e9c4204b73ad 100644 --- a/mm/mm_init.c +++ b/mm/mm_init.c @@ -1394,7 +1394,6 @@ static void __meminit pgdat_init_internals(struct pglist_data *pgdat) for (i = 0; i < NR_VMSCAN_THROTTLE; i++) init_waitqueue_head(&pgdat->reclaim_wait[i]); - pgdat_page_ext_init(pgdat); lruvec_init(&pgdat->__lruvec); } diff --git a/mm/page_ext.c b/mm/page_ext.c index e2e92bd27ebd..b679a8c1f7d7 100644 --- a/mm/page_ext.c +++ b/mm/page_ext.c @@ -164,11 +164,6 @@ void __init page_ext_init_flatmem_late(void) invoke_init_callbacks(); } -void __meminit pgdat_page_ext_init(struct pglist_data *pgdat) -{ - pgdat->node_page_ext = NULL; -} - static struct page_ext *lookup_page_ext(const struct page *page) { unsigned long pfn = page_to_pfn(page); @@ -494,10 +489,6 @@ void __init page_ext_init(void) panic("Out of memory"); } -void __meminit pgdat_page_ext_init(struct pglist_data *pgdat) -{ -} - #endif /** -- 2.43.0