+ mm-sparse-vmemmap-remove-the-unused-ptpfn-argument.patch added to mm-unstable branch

+ mm-sparse-vmemmap-remove-the-unused-ptpfn-argument.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/sparse-vmemmap: remove the unused ptpfn argument
has been added to the -mm mm-unstable branch.  Its filename is
     mm-sparse-vmemmap-remove-the-unused-ptpfn-argument.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-sparse-vmemmap-remove-the-unused-ptpfn-argument.patch

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

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------------------------------------------------------
From: Muchun Song <muchun.song@linux.dev>
Subject: mm/sparse-vmemmap: remove the unused ptpfn argument
Date: Sat, 10 Oct 2026 15:57:53 +0800

vmemmap_pte_populate() no longer uses ptpfn as an input.  Drop the
argument to simplify the code.

Link: https://lore.kernel.org/20261010075755.83339-5-songmuchun@bytedance.com
Signed-off-by: Muchun Song <muchun.song@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Lance Yang <lance.yang@linux.dev>
Acked-by: Qi Zheng <qi.zheng@linux.dev>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Christophe Leroy <chleroy@kernel.org>
Cc: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Cc: Shrikanth Hegde <sshegde@linux.ibm.com>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Michal Hocko <mhocko@suse.com>
---

 mm/sparse-vmemmap.c |   15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

--- a/mm/sparse-vmemmap.c~mm-sparse-vmemmap-remove-the-unused-ptpfn-argument
+++ a/mm/sparse-vmemmap.c
@@ -282,7 +282,7 @@ static __meminit void *vmemmap_alloc_pte
 }
 
 static pte_t * __meminit vmemmap_pte_populate(pmd_t *pmd, unsigned long addr, int node,
-		struct vmem_altmap *altmap, unsigned long ptpfn)
+		struct vmem_altmap *altmap)
 {
 	pte_t *pte = pte_offset_kernel(pmd, addr);
 	unsigned long pfn = page_to_pfn((struct page *)addr);
@@ -353,8 +353,7 @@ static pgd_t * __meminit vmemmap_pgd_pop
 }
 
 static pte_t * __meminit vmemmap_populate_address(unsigned long addr, int node,
-					      struct vmem_altmap *altmap,
-					      unsigned long ptpfn)
+						  struct vmem_altmap *altmap)
 {
 	pgd_t *pgd;
 	p4d_t *p4d;
@@ -374,7 +373,7 @@ static pte_t * __meminit vmemmap_populat
 	pmd = vmemmap_pmd_populate(pud, addr, node);
 	if (!pmd)
 		return NULL;
-	pte = vmemmap_pte_populate(pmd, addr, node, altmap, ptpfn);
+	pte = vmemmap_pte_populate(pmd, addr, node, altmap);
 	if (!pte)
 		return NULL;
 	vmemmap_verify(pte, node, addr, addr + PAGE_SIZE);
@@ -384,15 +383,13 @@ static pte_t * __meminit vmemmap_populat
 
 static int __meminit vmemmap_populate_range(unsigned long start,
 					    unsigned long end, int node,
-					    struct vmem_altmap *altmap,
-					    unsigned long ptpfn)
+					    struct vmem_altmap *altmap)
 {
 	unsigned long addr = start;
 	pte_t *pte;
 
 	for (; addr < end; addr += PAGE_SIZE) {
-		pte = vmemmap_populate_address(addr, node, altmap,
-					       ptpfn);
+		pte = vmemmap_populate_address(addr, node, altmap);
 		if (!pte)
 			return -ENOMEM;
 	}
@@ -403,7 +400,7 @@ static int __meminit vmemmap_populate_ra
 int __meminit vmemmap_populate_basepages(unsigned long start, unsigned long end,
 					 int node, struct vmem_altmap *altmap)
 {
-	return vmemmap_populate_range(start, end, node, altmap, -1);
+	return vmemmap_populate_range(start, end, node, altmap);
 }
 
 /*
_

Patches currently in -mm which might be from muchun.song@linux.dev are

mm-sparse-vmemmap-drop-vmemmap_populate_dax.patch
mm-sparse-vmemmap-support-device-dax-in-common-vmemmap-path.patch
mm-sparse-vmemmap-drop-device-dax-specific-population-path.patch
mm-sparse-vmemmap-remove-the-unused-ptpfn-argument.patch
mm-sparse-vmemmap-open-code-vmemmap_populate_address.patch
mm-mm_init-add-zone-mismatch-warning-during-page-init.patch
mm-mm_init-add-zone-mismatch-warning-during-page-init-fix.patch
mm-fix-missing-page-table-destructor-in-pagetable_free.patch
riscv-mm-fix-hotplug-page-table-destructor-handling.patch
riscv-mm-fix-missing-destructor-for-hotplug-pud-tables.patch
arm64-mm-fix-destructor-for-unconstructed-hotplug-page-tables.patch