[merged mm-stable] mm-sparse-initialize-memory-sections-earlier.patch removed from -mm tree

[merged mm-stable] mm-sparse-initialize-memory-sections-earlier.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/sparse: initialize memory sections earlier
has been removed from the -mm tree.  Its filename was
     mm-sparse-initialize-memory-sections-earlier.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: Muchun Song <songmuchun@bytedance.com>
Subject: mm/sparse: initialize memory sections earlier
Date: Thu, 10 Sep 2026 14:32:48 +0800

Upcoming HugeTLB bootmem changes need sparsemem section metadata before
the HugeTLB bootmem allocation path runs.  The memory sections are
initialized from sparse_init(), which is called too late for that setup.

Move the code that initializes sparsemem section metadata for memblock
ranges into mm_core_init_early(), before free_area_init() and the HugeTLB
bootmem setup.  Rename the helper to sparse_sections_init() so the new
caller describes the sparsemem-specific initialization step.

This is a preparatory change.

Link: https://lore.kernel.org/20260910063256.64386-10-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Acked-by: Qi Zheng <qi.zheng@linux.dev>
Cc: David Hildenbrand (Arm) <david@kernel.org>
Cc: David Laight <david.laight.linux@gmail.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
---

 mm/mm_init.c |    1 +
 mm/sparse.c  |    9 +--------
 mm/sparse.h  |    2 ++
 3 files changed, 4 insertions(+), 8 deletions(-)

--- a/mm/mm_init.c~mm-sparse-initialize-memory-sections-earlier
+++ a/mm/mm_init.c
@@ -2642,6 +2642,7 @@ void __init mm_core_init_early(void)
 {
 	kho_memory_init_early();
 
+	sparse_sections_init();
 	free_area_init();
 
 	hugetlb_cma_reserve();
--- a/mm/sparse.c~mm-sparse-initialize-memory-sections-earlier
+++ a/mm/sparse.c
@@ -191,12 +191,7 @@ static void __init memory_present(int ni
 	}
 }
 
-/*
- * Mark all memblocks as present using memory_present().
- * This is a convenience function that is useful to mark all of the systems
- * memory as present during initialization.
- */
-static void __init memblocks_present(void)
+void __init sparse_sections_init(void)
 {
 	unsigned long start, end;
 	int i, nid;
@@ -322,8 +317,6 @@ void __init sparse_init(void)
 	unsigned long pnum_end, pnum_begin, map_count = 1;
 	int nid_begin;
 
-	memblocks_present();
-
 	if (compound_info_has_mask()) {
 		VM_WARN_ON_ONCE(!IS_ALIGNED((unsigned long) pfn_to_page(0),
 				    MAX_FOLIO_VMEMMAP_ALIGN));
--- a/mm/sparse.h~mm-sparse-initialize-memory-sections-earlier
+++ a/mm/sparse.h
@@ -59,6 +59,7 @@ static inline bool vmemmap_optimizable_o
  */
 #ifdef CONFIG_SPARSEMEM
 void sparse_init(void);
+void sparse_sections_init(void);
 int sparse_index_init(unsigned long section_nr, int nid);
 
 static inline void sparse_init_one_section(struct mem_section *ms,
@@ -104,6 +105,7 @@ static inline bool section_vmemmap_optim
 }
 #else
 static inline void sparse_init(void) {}
+static inline void sparse_sections_init(void) {}
 #endif /* CONFIG_SPARSEMEM */
 
 /*
_

Patches currently in -mm which might be from songmuchun@bytedance.com are