From cbbd561893f65e2b31cf9c18634405cb8d8bf6f0 Mon Sep 17 00:00:00 2001
From: "David Hildenbrand (Arm)" <david@kernel.org>
Date: Thu, 16 Jul 2026 16:51:02 +0200
Subject: s390/mm: use free_reserved_pages() in vmem_free_pages()

Let's use our new generic helper.

Link: https://lore.kernel.org/20260716-bootmem_info_part2-v2-3-4afc76c73d61@kernel.org
Signed-off-by: David Hildenbrand (Arm) <david@kernel.org>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Muchun Song <muchun.song@linux.dev>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: "Borislav Petkov (AMD)" <bp@alien8.de>
Cc: Brendan Jackman <jackmanb@google.com>
Cc: Brendan Jackman <brendan.jackman@linux.dev>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
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: Peter Zijlstra <peterz@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
 arch/s390/mm/vmem.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index 94ee06ae8913..d2879ce860a1 100644
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -39,7 +39,6 @@ static void __ref *vmem_alloc_pages(unsigned int order)
 
 static void vmem_free_pages(unsigned long addr, int order, struct vmem_altmap *altmap)
 {
-	unsigned int nr_pages = 1 << order;
 	struct page *page;
 
 	if (altmap) {
@@ -49,8 +48,7 @@ static void vmem_free_pages(unsigned long addr, int order, struct vmem_altmap *a
 	page = virt_to_page((void *)addr);
 	if (PageReserved(page)) {
 		/* allocated from memblock */
-		while (nr_pages--)
-			free_reserved_page(page++);
+		free_reserved_pages(page, order);
 	} else {
 		free_pages(addr, order);
 	}
-- 
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