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| author | Yu Kuai <yukuai3@huawei.com> | 2023-11-25 16:16:03 +0800 |
|---|---|---|
| committer | Song Liu <song@kernel.org> | 2023-11-27 15:49:05 -0800 |
| commit | ad8606702f268903b26795e6b93605646fd1a6a8 (patch) | |
| tree | 2bfd1c6af1b58d618bcd5841ae5ee84bc9649a71 /kernel | |
| parent | 2d32777d60de81aa020a2431567020af26564c71 (diff) | |
| download | linux-stable-ad8606702f268903b26795e6b93605646fd1a6a8.tar.gz linux-stable-ad8606702f268903b26795e6b93605646fd1a6a8.tar.bz2 linux-stable-ad8606702f268903b26795e6b93605646fd1a6a8.zip | |
md/raid5: remove rcu protection to access rdev from conf
Because it's safe to accees rdev from conf:
- If any spinlock is held, because synchronize_rcu() from
md_kick_rdev_from_array() will prevent 'rdev' to be freed until
spinlock is released;
- If 'reconfig_lock' is held, because rdev can't be added or removed from
array;
- If there is normal IO inflight, because mddev_suspend() will prevent
rdev to be added or removed from array;
- If there is sync IO inflight, because 'MD_RECOVERY_RUNNING' is
checked in remove_and_add_spares().
And these will cover all the scenarios in raid456.
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20231125081604.3939938-5-yukuai1@huaweicloud.com
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions