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([110.9.142.4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2d0aa4d67dcsm9219905ad.70.2026.08.04.08.12.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 04 Aug 2026 08:12:36 -0700 (PDT) From: Sang-Heon Jeon To: Andrew Morton , David Hildenbrand , Mike Rapoport , Vlastimil Babka Cc: Brendan Jackman , Johannes Weiner , "Liam R. Howlett" , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Lorenzo Stoakes , Michal Hocko , Suren Baghdasaryan , Zi Yan Subject: [PATCH v2 2/2] mm/page_ext: remove pgdat_page_ext_init() Date: Wed, 5 Aug 2026 00:11:42 +0900 Message-ID: <20260804151145.3419768-3-ekffu200098@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260804151145.3419768-1-ekffu200098@gmail.com> References: <20260804151145.3419768-1-ekffu200098@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit pgdat_page_ext_init() sets pgdat->node_page_ext to NULL only on FLATMEM. FLATMEM depends on !NUMA, 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