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| author | Li Lingfeng <lilingfeng3@huawei.com> | 2023-12-29 15:05:00 +0800 |
|---|---|---|
| committer | Song Liu <song@kernel.org> | 2024-02-05 15:23:58 -0800 |
| commit | 9cfcf99e7ed613e6b3697e1c1034a24487ec3154 (patch) | |
| tree | c13b5cef52ef3e3bf9d144abe0b48e778aeb433c /tools/perf/scripts/python/exported-sql-viewer.py | |
| parent | faeaf210a559eb05bc1a294082d100d01c49a1e9 (diff) | |
md: get rdev->mddev with READ_ONCE()
Users may get rdev->mddev by sysfs while rdev is releasing.
So use both READ_ONCE() and WRITE_ONCE() to prevent load/store tearing
and to read/write mddev atomically.
Signed-off-by: Li Lingfeng <lilingfeng3@huawei.com>
Reviewed-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20231229070500.3602712-1-lilingfeng@huaweicloud.com
Diffstat (limited to 'tools/perf/scripts/python/exported-sql-viewer.py')
0 files changed, 0 insertions, 0 deletions