[merged mm-stable] mm-sparse-move-subsection_map_init-into-sparse_init.patch removed from -mm tree

The quilt patch titled
     Subject: mm/sparse: move subsection_map_init() into sparse_init()
has been removed from the -mm tree.  Its filename was
     mm-sparse-move-subsection_map_init-into-sparse_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: Muchun Song <[email protected]>
Subject: mm/sparse: move subsection_map_init() into sparse_init()
Date: Fri, 12 Jun 2026 11:58:51 +0800

subsection_map_init() is part of sparse memory initialization, but it is
currently called from free_area_init().

Move it into sparse_init() so the sparse-specific setup stays together
instead of being split across the generic free_area_init() path.

Link: https://lore.kernel.org/[email protected]
Signed-off-by: Muchun Song <[email protected]>
Acked-by: Mike Rapoport (Microsoft) <[email protected]>
Acked-by: Oscar Salvador <[email protected]>
Cc: "Aneesh Kumar K.V" <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: Frank van der Linden <[email protected]>
Cc: Liam R. Howlett <[email protected]>
Cc: Lorenzo Stoakes <[email protected]>
Cc: Madhavan Srinivasan <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Oscar Salvador (SUSE) <[email protected]>
Cc: "Ritesh Harjani (IBM)" <[email protected]>
Cc: Usama Arif <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---

 mm/internal.h       |    5 ++---
 mm/mm_init.c        |   10 ++--------
 mm/sparse-vmemmap.c |   11 ++++++++++-
 mm/sparse.c         |    1 +
 4 files changed, 15 insertions(+), 12 deletions(-)

--- a/mm/internal.h~mm-sparse-move-subsection_map_init-into-sparse_init
+++ a/mm/internal.h
@@ -994,10 +994,9 @@ static inline void sparse_init(void) {}
  * mm/sparse-vmemmap.c
  */
 #ifdef CONFIG_SPARSEMEM_VMEMMAP
-void sparse_init_subsection_map(unsigned long pfn, unsigned long nr_pages);
+void sparse_init_subsection_map(void);
 #else
-static inline void sparse_init_subsection_map(unsigned long pfn,
-		unsigned long nr_pages)
+static inline void sparse_init_subsection_map(void)
 {
 }
 #endif /* CONFIG_SPARSEMEM_VMEMMAP */
--- a/mm/mm_init.c~mm-sparse-move-subsection_map_init-into-sparse_init
+++ a/mm/mm_init.c
@@ -1871,18 +1871,12 @@ static void __init free_area_init(void)
 			       (u64)zone_movable_pfn[i] << PAGE_SHIFT);
 	}
 
-	/*
-	 * Print out the early node map, and initialize the
-	 * subsection-map relative to active online memory ranges to
-	 * enable future "sub-section" extensions of the memory map.
-	 */
+	/* Print out the early node map. */
 	pr_info("Early memory node ranges\n");
-	for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, &nid) {
+	for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, &nid)
 		pr_info("  node %3d: [mem %#018Lx-%#018Lx]\n", nid,
 			(u64)start_pfn << PAGE_SHIFT,
 			((u64)end_pfn << PAGE_SHIFT) - 1);
-		sparse_init_subsection_map(start_pfn, end_pfn - start_pfn);
-	}
 
 	/* Initialise every node */
 	mminit_verify_pageflags_layout();
--- a/mm/sparse.c~mm-sparse-move-subsection_map_init-into-sparse_init
+++ a/mm/sparse.c
@@ -361,5 +361,6 @@ void __init sparse_init(void)
 	}
 	/* cover the last node */
 	sparse_init_nid(nid_begin, pnum_begin, pnum_end, map_count);
+	sparse_init_subsection_map();
 	vmemmap_populate_print_last();
 }
--- a/mm/sparse-vmemmap.c~mm-sparse-move-subsection_map_init-into-sparse_init
+++ a/mm/sparse-vmemmap.c
@@ -603,7 +603,7 @@ static void subsection_mask_set(unsigned
 	bitmap_set(map, idx, end - idx + 1);
 }
 
-void __init sparse_init_subsection_map(unsigned long pfn, unsigned long nr_pages)
+static void __init sparse_init_subsection_map_range(unsigned long pfn, unsigned long nr_pages)
 {
 	int end_sec_nr = pfn_to_section_nr(pfn + nr_pages - 1);
 	unsigned long nr, start_sec_nr = pfn_to_section_nr(pfn);
@@ -626,6 +626,15 @@ void __init sparse_init_subsection_map(u
 	}
 }
 
+void __init sparse_init_subsection_map(void)
+{
+	int i, nid;
+	unsigned long start, end;
+
+	for_each_mem_pfn_range(i, MAX_NUMNODES, &start, &end, &nid)
+		sparse_init_subsection_map_range(start, end - start);
+}
+
 #ifdef CONFIG_MEMORY_HOTPLUG
 
 /* Mark all memory sections within the pfn range as online */
_

Patches currently in -mm which might be from [email protected] are

selftests-mm-remove-obsolete-hugetlb-vmemmap-test.patch