mm/huge_memory: access vm_page_prot with READ_ONCE in remove_migration_pmd

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vma->vm_page_prot is read lockless from the rmap_walk, it may be updated
concurrently.  Using READ_ONCE to prevent the risk of reading intermediate
values.

Link: https://lkml.kernel.org/r/20220704132201.14611-3-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Zach O'Keefe <zokeefe@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

...

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Miaohe Lin 2022-07-04 21:21:47 +08:00 • committed by akpm

parent 7c38f1812d

commit 4286f14748

1 changed files with 1 additions and 1 deletions

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mm/huge_memory.c

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