[merged mm-hotfixes-stable] riscv-mm-fix-missing-destructor-for-hotplug-pud-tables.patch removed from -mm tree

[merged mm-hotfixes-stable] riscv-mm-fix-missing-destructor-for-hotplug-pud-tables.patch removed from -mm tree

[Andrew Morton]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain, Size: 4055 bytes --]


The quilt patch titled
     Subject: riscv/mm: fix missing destructor for hotplug PUD tables
has been removed from the -mm tree.  Its filename was
     riscv-mm-fix-missing-destructor-for-hotplug-pud-tables.patch

This patch was dropped because it was merged into the mm-hotfixes-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Muchun Song <muchun.song@linux.dev>
Subject: riscv/mm: fix missing destructor for hotplug PUD tables
Date: Fri, 23 Oct 2026 14:34:27 +0800

Commit 8472cc4503eb ("riscv: mm: call PUD/P4D ctor in special kernel
pgtable alloc") made alloc_pud_late() run the PUD page-table constructor.
However, free_pud_table() still frees non-reserved PUD tables directly
without decrementing NR_PAGETABLE.

Free PUD tables through the common free_pgtable_page() helper so that
constructor-backed tables run the matching destructor before being
freed.

Link: https://lore.kernel.org/20261023063428.3658761-4-songmuchun@bytedance.com
Fixes: 8472cc4503eb ("riscv: mm: call PUD/P4D ctor in special kernel pgtable alloc")
Signed-off-by: Muchun Song <muchun.song@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Björn Töpel <bjorn@kernel.org>
Reviewed-by: Kevin Brodsky <kevin.brodsky@arm.com>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Paul Walmsley <pjw@kernel.org>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexandre Ghiti <alex@ghiti.fr>
Cc: Björn Töpel <bjorn@rivosinc.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: <stable@vger.kernel.org>
---

 arch/riscv/mm/init.c |    5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

--- a/arch/riscv/mm/init.c~riscv-mm-fix-missing-destructor-for-hotplug-pud-tables
+++ a/arch/riscv/mm/init.c
@@ -1553,10 +1553,7 @@ static void __meminit free_pud_table(pud
 			return;
 	}
 
-	if (PageReserved(page))
-		free_reserved_page(page);
-	else
-		__free_pages(page, 0);
+	free_pgtable_page(page);
 	p4d_clear(p4d);
 }
 
_

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

arm64-mm-fix-destructor-for-unconstructed-hotplug-page-tables.patch
mm-sparse-vmemmap-map-shared-vmemmap-tail-pages-as-read-only.patch
powerpc-mm-map-shared-vmemmap-tail-pages-as-read-only.patch
mm-hugetlb_vmemmap-remove-vmemmap_wrprotect_hvo.patch
mm-hugetlb_vmemmap-remove-hugetlb_vmemmap_optimize_bootmem_folios.patch
mm-generalize-kernel-pte-table-allocation.patch
mm-generalize-pmd-page-table-allocation.patch
mm-generalize-pud-page-table-allocation.patch
mm-remove-pagetable_dtor_free.patch
mm-remove-redundant-pagetable_dtor-calls.patch
mm-hugetlb_vmemmap-remove-hugetlb-specific-vmemmap-optimization-macros.patch
mm-hugetlb_vmemmap-unify-vmemmap_splitremap_no_tlb_flush.patch
mm-hugetlb_vmemmap-simplify-vmemmap-head-page-handling.patch
mm-hugetlb_vmemmap-generalize-vmemmap-page-allocation.patch
mm-hugetlb_vmemmap-unify-writable-vmemmap-page-preparation.patch
mm-hugetlb_vmemmap-rename-vmemmap_remap_pte-to-vmemmap_optimize_pte.patch
mm-hugetlb_vmemmap-simplify-shared-tail-page-handling.patch
mm-hugetlb_vmemmap-move-alloc_vmemmap_page_list-next-to-its-free-helper.patch
mm-hugetlb_vmemmap-make-vmemmap-optimization-folio-oriented.patch
mm-hugetlb_vmemmap-make-vmemmap-restoration-folio-oriented.patch
mm-hugetlb_vmemmap-unify-vmemmap-range-restoration.patch
mm-hugetlb_vmemmap-make-vmemmap-pte-conversion-folio-oriented.patch
mm-hugetlb-fix-validation-of-unsupported-hugetlb-orders.patch
powerpc-mm-make-vmemmap_populate_compound_pages-static.patch
powerpc-mm-drop-powerpc-vmemmap_can_optimize.patch
loongarch-mm-disable-device-dax-vmemmap-optimization.patch
mm-sparse-vmemmap-drop-vmemmap_can_optimize.patch
mm-sparse-vmemmap-drop-pgmap-from-vmemmap-population-apis.patch