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| author |   Miaohe Lin <linmiaohe@huawei.com> | 2022-07-04 21:21:47 +0800 |
|---|---|---|
| committer |   akpm <akpm@linux-foundation.org> | 2022-07-17 17:14:44 -0700 |
| commit | 4286f14748c13de42c1c4ab77a92fdfb37e6e5ef (patch) | |
| tree | 56130c5b8745e809b1ed26ebb697b58f3614f803 /mm/shrinker_debug.c | |
| parent | mm/huge_memory: use flush_pmd_tlb_range in move_huge_pmd (diff) | |
| download | wireguard-linux-4286f14748c13de42c1c4ab77a92fdfb37e6e5ef.tar.xz wireguard-linux-4286f14748c13de42c1c4ab77a92fdfb37e6e5ef.zip | |
mm/huge_memory: access vm_page_prot with READ_ONCE in remove_migration_pmd
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>
Diffstat (limited to 'mm/shrinker_debug.c')
0 files changed, 0 insertions, 0 deletions