The quilt patch titled
Subject: mm: hugetlb_vmemmap: add missing smp_wmb() before set_pte_at()
has been removed from the -mm tree. Its filename was
mm-hugetlb_vmemmap-add-missing-smp_wmb-before-set_pte_at.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: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Subject: mm: hugetlb_vmemmap: add missing smp_wmb() before set_pte_at()
Date: Tue, 16 Aug 2022 21:05:51 +0800
The memory barrier smp_wmb() is needed to make sure that preceding stores
to the page contents become visible before the below set_pte_at() write.
Link: https://lkml.kernel.org/r/20220816130553.31406-5-linmiaohe@xxxxxxxxxx
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Reviewed-by: Yin Fengwei <fengwei.yin@xxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Cc: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb_vmemmap.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/mm/hugetlb_vmemmap.c~mm-hugetlb_vmemmap-add-missing-smp_wmb-before-set_pte_at
+++ a/mm/hugetlb_vmemmap.c
@@ -287,6 +287,11 @@ static void vmemmap_restore_pte(pte_t *p
copy_page(to, (void *)walk->reuse_addr);
reset_struct_pages(to);
+ /*
+ * Makes sure that preceding stores to the page contents become visible
+ * before the set_pte_at() write.
+ */
+ smp_wmb();
set_pte_at(&init_mm, addr, pte, mk_pte(page, pgprot));
}
_
Patches currently in -mm which might be from linmiaohe@xxxxxxxxxx are
mm-hwpoison-use-clearpagehwpoison-in-memory_failure.patch
mm-hwpoison-use-__pagemovable-to-detect-non-lru-movable-pages.patch
mm-hwpoison-use-num_poisoned_pages_sub-to-decrease-num_poisoned_pages.patch
mm-hwpoison-avoid-unneeded-page_mapped_in_vma-overhead-in-collect_procs_anon.patch
mm-hwpoison-check-pagetable-explicitly-in-hwpoison_user_mappings.patch
mm-hwpoison-cleanup-some-obsolete-comments.patch
writeback-remove-unused-macro-dirty_full_scope.patch
