[to-be-updated] mm-khugepaged-unmap-pte-before-releasing-vma-write-lock.patch removed from -mm tree

[to-be-updated] mm-khugepaged-unmap-pte-before-releasing-vma-write-lock.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/khugepaged: unmap pte before releasing vma write lock
has been removed from the -mm tree.  Its filename was
     mm-khugepaged-unmap-pte-before-releasing-vma-write-lock.patch

This patch was dropped because an updated version will be issued

------------------------------------------------------
From: "Nico Pache (Red Hat)" <nico.pache@linux.dev>
Subject: mm/khugepaged: unmap pte before releasing vma write lock
Date: Tue, 04 Aug 2026 13:25:04 -0600

We are currently dropping the anon_vma write lock before unmapping the
PTE.  Although this is safe, due to us still holding the mmap_write_lock,
its safer and less confusing to switch the order of these two operations.

Link: https://lore.kernel.org/20260804-khugepaged_pte_refactor-v3-6-0364cad642a0@linux.dev
Signed-off-by: Nico Pache (Red Hat) <nico.pache@linux.dev>
Suggested-by: David Hildenbrand <david@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Lance Yang <lance.yang@linux.dev>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Usama Arif <usama.arif@linux.dev>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/khugepaged.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/mm/khugepaged.c~mm-khugepaged-unmap-pte-before-releasing-vma-write-lock
+++ a/mm/khugepaged.c
@@ -1546,10 +1546,10 @@ static enum scan_result collapse_huge_pa
 
 	result = SCAN_SUCCEED;
 out_up_write:
-	if (anon_vma_locked)
-		anon_vma_unlock_write(vma->anon_vma);
 	if (pte)
 		pte_unmap(pte);
+	if (anon_vma_locked)
+		anon_vma_unlock_write(vma->anon_vma);
 	mmap_write_unlock(mm);
 out_nolock:
 	if (folio)
_

Patches currently in -mm which might be from nico.pache@linux.dev are

mm-documentation-clarify-where-the-mthp-stats-live.patch