linux-kernel - [PATCH v3 6/7] mm: Use for_each_valid_pfn() in memory

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Message-ID: <20250423081828.608422-7-dwmw2@infradead.org>
Date: Wed, 23 Apr 2025 08:52:48 +0100
From: David Woodhouse <dwmw2@...radead.org>
To: Mike Rapoport <rppt@...nel.org>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	"Sauerwein, David" <dssauerw@...zon.de>,
	Anshuman Khandual <anshuman.khandual@....com>,
	Ard Biesheuvel <ardb@...nel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	David Hildenbrand <david@...hat.com>,
	Marc Zyngier <maz@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Mike Rapoport <rppt@...ux.ibm.com>,
	Will Deacon <will@...nel.org>,
	kvmarm@...ts.cs.columbia.edu,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	Ruihan Li <lrh2000@....edu.cn>
Subject: [PATCH v3 6/7] mm: Use for_each_valid_pfn() in memory_hotplug

From: David Woodhouse <dwmw@...zon.co.uk>

Signed-off-by: David Woodhouse <dwmw@...zon.co.uk>
---
 mm/memory_hotplug.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 8305483de38b..8f74c55137bf 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1756,12 +1756,10 @@ static int scan_movable_pages(unsigned long start, unsigned long end,
 {
 	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 long start_pfn, unsigned long end_pfn)
 	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);
 
-- 
2.49.0