[merged mm-stable] mm-migrate_device-cleanup-up-pmd-checks-and-warnings.patch removed from -mm tree

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

The quilt patch titled
     Subject: mm/migrate_device: cleanup up PMD Checks and warnings
has been removed from the -mm tree.  Its filename was
     mm-migrate_device-cleanup-up-pmd-checks-and-warnings.patch

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

------------------------------------------------------
From: Sunny Patel <nueralspacetech@gmail.com>
Subject: mm/migrate_device: cleanup up PMD Checks and warnings
Date: Sun, 19 Apr 2026 23:17:43 +0530

Remove the odd VM_WARN_ON_FOLIO(!folio, folio) usage and replace it with a
simpler VM_WARN_ON_ONCE(!folio) check.

Drop the redundant VM_WARN_ON_ONCE(!pmd_none(*pmdp) &&
!is_huge_zero_pmd(*pmdp)).

Refactor the PMD checks, making the control flow clearer and avoiding
duplicate condition checks.

Link: https://lore.kernel.org/20260419174747.10701-1-nueralspacetech@gmail.com
Signed-off-by: Sunny Patel <nueralspacetech@gmail.com>
Acked-by: Zi Yan <ziy@nvidia.com>
Reviewed-by: Huang Ying <ying.huang@linux.alibaba.com>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: Gregory Price <gourry@gourry.net>
Cc: "Huang, Ying" <ying.huang@linux.alibaba.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Rakie Kim <rakie.kim@sk.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/migrate_device.c |    9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

--- a/mm/migrate_device.c~mm-migrate_device-cleanup-up-pmd-checks-and-warnings
+++ a/mm/migrate_device.c
@@ -801,8 +801,7 @@ static int migrate_vma_insert_huge_pmd_p
 	bool flush = false;
 	unsigned long i;
 
-	VM_WARN_ON_FOLIO(!folio, folio);
-	VM_WARN_ON_ONCE(!pmd_none(*pmdp) && !is_huge_zero_pmd(*pmdp));
+	VM_WARN_ON_ONCE(!folio);
 
 	if (!thp_vma_suitable_order(vma, addr, HPAGE_PMD_ORDER))
 		return -EINVAL;
@@ -859,11 +858,9 @@ static int migrate_vma_insert_huge_pmd_p
 	if (userfaultfd_missing(vma))
 		goto unlock_abort;
 
-	if (!pmd_none(*pmdp)) {
-		if (!is_huge_zero_pmd(*pmdp))
-			goto unlock_abort;
+	if (is_huge_zero_pmd(*pmdp))
 		flush = true;
-	} else if (!pmd_none(*pmdp))
+	else if (!pmd_none(*pmdp))
 		goto unlock_abort;
 
 	add_mm_counter(vma->vm_mm, MM_ANONPAGES, HPAGE_PMD_NR);
_

Patches currently in -mm which might be from nueralspacetech@gmail.com are