Date: Mon, 24 Aug 2026 18:53:54 -0700
To: mm-commits@vger.kernel.org,ziy@nvidia.com,vbabka@kernel.org,surenb@google.com,rppt@kernel.org,mhocko@suse.com,ljs@kernel.org,liam@infradead.org,hannes@cmpxchg.org,david@kernel.org,ekffu200098@gmail.com,akpm@linux-foundation.org
From: Andrew Morton <akpm@linux-foundation.org>
Subject: [merged mm-stable] mm-page_ext-remove-pgdat_page_ext_init.patch removed from -mm tree
Message-Id: <20260825015354.7E2291F000E9@smtp.kernel.org>
Precedence: bulk


The quilt patch titled
     Subject: mm/page_ext: remove pgdat_page_ext_init()
has been removed from the -mm tree.  Its filename was
     mm-page_ext-remove-pgdat_page_ext_init.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Sang-Heon Jeon <ekffu200098@gmail.com>
Subject: mm/page_ext: remove pgdat_page_ext_init()
Date: Wed, 5 Aug 2026 00:11:42 +0900

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.

Link: https://lore.kernel.org/20260804151145.3419768-3-ekffu200098@gmail.com
Signed-off-by: Sang-Heon Jeon <ekffu200098@gmail.com>
Acked-by: Zi Yan <ziy@nvidia.com>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/page_ext.h |    5 -----
 mm/mm_init.c             |    1 -
 mm/page_ext.c            |    9 ---------
 3 files changed, 15 deletions(-)

--- a/include/linux/page_ext.h~mm-page_ext-remove-pgdat_page_ext_init
+++ a/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_enable
 	return false;
 }
 
-static inline void pgdat_page_ext_init(struct pglist_data *pgdat)
-{
-}
-
 static inline void page_ext_init(void)
 {
 }
--- a/mm/mm_init.c~mm-page_ext-remove-pgdat_page_ext_init
+++ a/mm/mm_init.c
@@ -1394,7 +1394,6 @@ static void __meminit pgdat_init_interna
 	for (i = 0; i < NR_VMSCAN_THROTTLE; i++)
 		init_waitqueue_head(&pgdat->reclaim_wait[i]);
 
-	pgdat_page_ext_init(pgdat);
 	lruvec_init(&pgdat->__lruvec);
 }
 
--- a/mm/page_ext.c~mm-page_ext-remove-pgdat_page_ext_init
+++ a/mm/page_ext.c
@@ -164,11 +164,6 @@ void __init page_ext_init_flatmem_late(v
 	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 @@ oom:
 	panic("Out of memory");
 }
 
-void __meminit pgdat_page_ext_init(struct pglist_data *pgdat)
-{
-}
-
 #endif
 
 /**
_

Patches currently in -mm which might be from ekffu200098@gmail.com are