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mm: hugetlb_vmemmap: add missing smp_wmb() before set_pte_at()
authorMiaohe Lin <linmiaohe@huawei.com>
Tue, 16 Aug 2022 13:05:51 +0000 (21:05 +0800)
committerAndrew Morton <akpm@linux-foundation.org>
Wed, 17 Aug 2022 20:58:37 +0000 (13:58 -0700)
commit04ac2d757731e6a83e3ec50a347f9a75c5a827c2
treedc1d20c8f466b1e36e76b8b8fbbc9f0853defc3atree
parentf00115abed904efaa1f7d9a02297171cf928ac65commit | diff
mm: hugetlb_vmemmap: add missing smp_wmb() before set_pte_at()

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@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
mm/hugetlb_vmemmap.c diff | blob | history
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