md/raid5-cache: use ring add to prevent overflow

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'write_pos' must be protected with 'r5l_ring_add', or it may overflow

Signed-off-by: JackieLiu <liuyun01@kylinos.cn>
Reviewed-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Shaohua Li <shli@fb.com>

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JackieLiu 2016-11-28 16:19:19 +08:00 • committed by Shaohua Li

parent 9b69173e5c

commit fc833c2a2f

1 changed files with 1 additions and 1 deletions

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drivers/md/raid5-cache.c

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