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(parent: faeaf21) | patch
md: get rdev->mddev with READ_ONCE()
authorLi Lingfeng <lilingfeng3@huawei.com>
Fri, 29 Dec 2023 07:05:00 +0000 (15:05 +0800)
committerSong Liu <song@kernel.org>
Mon, 5 Feb 2024 23:23:58 +0000 (15:23 -0800)
commit9cfcf99e7ed613e6b3697e1c1034a24487ec3154
treec13b5cef52ef3e3bf9d144abe0b48e778aeb433ctree | snapshot
parentfaeaf210a559eb05bc1a294082d100d01c49a1e9commit | 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
drivers/md/md.c diff | blob | blame | history
Linux 6.x block layer and io_uring tree(s)