Hi,
在 2023/04/11 9:15, Song Liu 写道:
On Mon, Apr 10, 2023 at 4:37 AM Yu Kuai <yukuai1@xxxxxxxxxxxxxxx> wrote:
From: Yu Kuai <yukuai3@xxxxxxxxxx>
Prepare to protect md_thread with rcu, there are no functional changes.
Why do we need this change? To add __rcu later?
Add __rcu is one reason, more importantly is to assign md_thread inside
md_register_thread in patch 6:
rcu_assign_pointer(*threadp, thread);
Can we do something like:
struct md_thread __rcu *md_register_thread(void (*run) (struct md_thread *),
struct mddev *mddev, const char *name)
I think this is not necessary, if we don't want to change api, we must
use rcu_assign_pointer for each caller to set md_thread.
Thanks,
Kuai
Thanks,
Song
.
