Re: [PATCH] list: Remove unnecessary WRITE_ONCE()

From: Eric Dumazet
Date: Mon Jun 19 2023 - 07:04:07 EST


On Mon, Jun 19, 2023 at 11:03 AM Alan Huang <mmpgouride@xxxxxxxxx> wrote:
>
> Commit c54a2744497d("list: Add hlist_unhashed_lockless()") added
> various WRITE_ONCE() to pair with the READ_ONCE() in
> hlist_unhashed_lockless(), but there is no need to protect
> ->next with WRITE_ONCE(). Therefore, this commit removes those
> unnecessary WRITE_ONCE().

Why are they unnecessary ?
They seem just fine to me.
Please elaborate.