+ mm-use-for_each_valid_pfn-in-memory_hotplug.patch added to mm-new branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: mm: use for_each_valid_pfn() in memory_hotplug
has been added to the -mm mm-new branch.  Its filename is
     mm-use-for_each_valid_pfn-in-memory_hotplug.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-use-for_each_valid_pfn-in-memory_hotplug.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: David Woodhouse <dwmw@amazon.co.uk>
Subject: mm: use for_each_valid_pfn() in memory_hotplug
Date: Wed, 23 Apr 2025 14:33:42 +0100

Link: https://lkml.kernel.org/r/20250423133821.789413-7-dwmw2@infradead.org
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Marc Rutland <mark.rutland@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Ruihan Li <lrh2000@pku.edu.cn>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/memory_hotplug.c |    8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

--- a/mm/memory_hotplug.c~mm-use-for_each_valid_pfn-in-memory_hotplug
+++ a/mm/memory_hotplug.c
@@ -1756,12 +1756,10 @@ static int scan_movable_pages(unsigned l
 {
 	unsigned long pfn;
 
-	for (pfn = start; pfn < end; pfn++) {
+	for_each_valid_pfn(pfn, start, end) {
 		struct page *page;
 		struct folio *folio;
 
-		if (!pfn_valid(pfn))
-			continue;
 		page = pfn_to_page(pfn);
 		if (PageLRU(page))
 			goto found;
@@ -1805,11 +1803,9 @@ static void do_migrate_range(unsigned lo
 	static DEFINE_RATELIMIT_STATE(migrate_rs, DEFAULT_RATELIMIT_INTERVAL,
 				      DEFAULT_RATELIMIT_BURST);
 
-	for (pfn = start_pfn; pfn < end_pfn; pfn++) {
+	for_each_valid_pfn(pfn, start_pfn, end_pfn) {
 		struct page *page;
 
-		if (!pfn_valid(pfn))
-			continue;
 		page = pfn_to_page(pfn);
 		folio = page_folio(page);
 
_

Patches currently in -mm which might be from dwmw@amazon.co.uk are

mm-introduce-for_each_valid_pfn-and-use-it-from-reserve_bootmem_region.patch
mm-implement-for_each_valid_pfn-for-config_flatmem.patch
mm-implement-for_each_valid_pfn-for-config_sparsemem.patch
mm-pm-use-for_each_valid_pfn-in-kernel-power-snapshotc.patch
mm-x86-use-for_each_valid_pfn-from-__ioremap_check_ram.patch
mm-use-for_each_valid_pfn-in-memory_hotplug.patch
mm-mm_init-use-for_each_valid_pfn-in-init_unavailable_range.patch