[merged mm-stable] mm-mincore-hold-ptl-in-mincore_hugetlb.patch removed from -mm tree

[merged mm-stable] mm-mincore-hold-ptl-in-mincore_hugetlb.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/mincore: hold PTL in mincore_hugetlb
has been removed from the -mm tree.  Its filename was
     mm-mincore-hold-ptl-in-mincore_hugetlb.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: Jinjiang Tu <tujinjiang@huawei.com>
Subject: mm/mincore: hold PTL in mincore_hugetlb
Date: Thu, 24 Jul 2025 17:09:58 +0800

Hold PTL in mincore_hugetlb() to avoid operating on stale page, as
mincore_pte_range() have done.

Link: https://lkml.kernel.org/r/20250724090958.455887-4-tujinjiang@huawei.com
Signed-off-by: Jinjiang Tu <tujinjiang@huawei.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Andrei Vagin <avagin@gmail.com>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Brahmajit Das <brahmajit.xyz@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: David Rientjes <rientjes@google.com>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Joern Engel <joern@logfs.org>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Thiago Jung Bauermann <thiago.bauermann@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/mincore.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/mm/mincore.c~mm-mincore-hold-ptl-in-mincore_hugetlb
+++ a/mm/mincore.c
@@ -29,7 +29,9 @@ static int mincore_hugetlb(pte_t *pte, u
 #ifdef CONFIG_HUGETLB_PAGE
 	unsigned char present;
 	unsigned char *vec = walk->private;
+	spinlock_t *ptl;
 
+	ptl = huge_pte_lock(hstate_vma(walk->vma), walk->mm, pte);
 	/*
 	 * Hugepages under user process are always in RAM and never
 	 * swapped out, but theoretically it needs to be checked.
@@ -38,6 +40,7 @@ static int mincore_hugetlb(pte_t *pte, u
 	for (; addr != end; vec++, addr += PAGE_SIZE)
 		*vec = present;
 	walk->private = vec;
+	spin_unlock(ptl);
 #else
 	BUG();
 #endif
_

Patches currently in -mm which might be from tujinjiang@huawei.com are

mm-memory_hotplug-fix-hwpoisoned-large-folio-handling-in-do_migrate_range.patch
mm-smaps-fix-race-between-smaps_hugetlb_range-and-migration.patch
fs-proc-task_mmu-hold-ptl-in-pagemap_hugetlb_range-and-gather_hugetlb_stats.patch