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

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

The patch titled
     Subject: mm/sparse-vmemmap: remove the unused ptpfn argument
has been added to the -mm mm-new 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-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
review feedback and post updated versions to replace or incrementally
fixup patches in mm-new.

The mm-new branch of mm.git is not included in linux-next

If a few days of testing in mm-new is successful, the patch will me moved
into mm.git's mm-unstable branch, which is included in linux-next

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------------------------------------------------------
From: Muchun Song <muchun.song@linux.dev>
Subject: mm/sparse-vmemmap: remove the unused ptpfn argument
Date: Tue, 29 Sep 2026 13:32:29 +0800

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

Link: https://lore.kernel.org/20260929053231.66085-5-songmuchun@bytedance.com
Signed-off-by: Muchun Song <muchun.song@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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
@@ -278,7 +278,7 @@ 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);
@@ -349,8 +349,7 @@ 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;
@@ -370,7 +369,7 @@ 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);
@@ -380,15 +379,13 @@ 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;
 	}
@@ -399,7 +396,7 @@ 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-factor-out-shared-vmemmap-tail-page-allocation.patch
mm-sparse-vmemmap-allocate-shared-tail-page-array-dynamically.patch
mm-sparse-vmemmap-introduce-config_vmemmap_optimization.patch
mm-sparse-vmemmap-open-code-init_compound_tail.patch
mm-sparse-vmemmap-prepare-dax-vmemmap-population-for-compound-page-orders.patch
mm-sparse-vmemmap-set-compound-page-order-for-device-dax.patch
mm-sparse-vmemmap-switch-device-dax-to-shared-tail-vmemmap-pages.patch
mm-sparse-vmemmap-switch-device-dax-to-shared-tail-vmemmap-pages-fix.patch
mm-sparse-vmemmap-move-vmemmap-optimization-helpers-to-a-public-header.patch
powerpc-mm-switch-device-dax-to-shared-tail-vmemmap-pages.patch
mm-sparse-vmemmap-drop-the-extra-tail-page-from-device-dax-reservation.patch
mm-sparse-vmemmap-drop-unused-section_nr_vmemmap_pages-arguments.patch
documentation-mm-update-dax-vmemmap-deduplication-docs.patch
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