+ mm-migrate_device-fix-double-unlock.patch added to mm-hotfixes-unstable branch

+ mm-migrate_device-fix-double-unlock.patch added to mm-hotfixes-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/migrate_device: fix double unlock
has been added to the -mm mm-hotfixes-unstable branch.  Its filename is
     mm-migrate_device-fix-double-unlock.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-migrate_device-fix-double-unlock.patch

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

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------------------------------------------------------
From: Sunny Patel <nueralspacetech@gmail.com>
Subject: mm/migrate_device: fix double unlock
Date: Tue, 14 Apr 2026 02:45:49 +0530

migrate_vma_collect_huge_pmd() calls spin_unlock(ptl) after
softleaf_entry_wait_on_locked(), which already releases the ptl.

Link: https://lkml.kernel.org/r/20260413211559.20969-1-nueralspacetech@gmail.com
Fixes: a30b48bf1b24 ("mm/migrate_device: implement THP migration of zone device pages")
Signed-off-by: Sunny Patel <nueralspacetech@gmail.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Balbir Singh <balbirs@nvidia.com>
Cc: Byungchul Park <byungchul@sk.com>
Cc: David Hildenbrand <david@kernel.org>
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>
Cc: Zi Yan <ziy@nvidia.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/migrate_device.c |    1 -
 1 file changed, 1 deletion(-)

--- a/mm/migrate_device.c~mm-migrate_device-fix-double-unlock
+++ a/mm/migrate_device.c
@@ -177,7 +177,6 @@ static int migrate_vma_collect_huge_pmd(
 
 		if (softleaf_is_migration(entry)) {
 			softleaf_entry_wait_on_locked(entry, ptl);
-			spin_unlock(ptl);
 			return -EAGAIN;
 		}
 
_

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

mm-migrate_device-fix-double-unlock.patch