[merged mm-stable] mm-memory_hotplug-simplify-check_pfn_span.patch removed from -mm tree

[merged mm-stable] mm-memory_hotplug-simplify-check_pfn_span.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/memory_hotplug: simplify check_pfn_span()
has been removed from the -mm tree.  Its filename was
     mm-memory_hotplug-simplify-check_pfn_span.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: "David Hildenbrand (Arm)" <david@kernel.org>
Subject: mm/memory_hotplug: simplify check_pfn_span()
Date: Fri, 20 Mar 2026 23:13:37 +0100

We now always have CONFIG_SPARSEMEM_VMEMMAP, so remove the dead code.

Link: https://lkml.kernel.org/r/20260320-sparsemem_cleanups-v2-5-096addc8800d@kernel.org
Signed-off-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Lorenzo Stoakes (Oracle) <ljs@kernel.org>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Wei Xu <weixugc@google.com>
Cc: Yuanchu Xie <yuanchu@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memory_hotplug.c |   20 ++++++--------------
 1 file changed, 6 insertions(+), 14 deletions(-)

--- a/mm/memory_hotplug.c~mm-memory_hotplug-simplify-check_pfn_span
+++ a/mm/memory_hotplug.c
@@ -319,21 +319,13 @@ static void release_memory_resource(stru
 static int check_pfn_span(unsigned long pfn, unsigned long nr_pages)
 {
 	/*
-	 * Disallow all operations smaller than a sub-section and only
-	 * allow operations smaller than a section for
-	 * SPARSEMEM_VMEMMAP. Note that check_hotplug_memory_range()
-	 * enforces a larger memory_block_size_bytes() granularity for
-	 * memory that will be marked online, so this check should only
-	 * fire for direct arch_{add,remove}_memory() users outside of
-	 * add_memory_resource().
+	 * Disallow all operations smaller than a sub-section.
+	 * Note that check_hotplug_memory_range() enforces a larger
+	 * memory_block_size_bytes() granularity for memory that will be marked
+	 * online, so this check should only fire for direct
+	 * arch_{add,remove}_memory() users outside of add_memory_resource().
 	 */
-	unsigned long min_align;
-
-	if (IS_ENABLED(CONFIG_SPARSEMEM_VMEMMAP))
-		min_align = PAGES_PER_SUBSECTION;
-	else
-		min_align = PAGES_PER_SECTION;
-	if (!IS_ALIGNED(pfn | nr_pages, min_align))
+	if (!IS_ALIGNED(pfn | nr_pages, PAGES_PER_SUBSECTION))
 		return -EINVAL;
 	return 0;
 }
_

Patches currently in -mm which might be from david@kernel.org are