linux-kernel - Re: [PATCH v2 3/4] Docs/RCU/rculist_nulls: Fix hlist

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Message-ID: <43943609-f80c-4b6a-9844-994eef800757@paulmck-laptop>
Date:   Wed, 14 Jun 2023 09:36:50 -0700
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     SeongJae Park <sj@...nel.org>
Cc:     joel@...lfernandes.org, mmpgouride@...il.com, corbet@....net,
        rcu@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/4] Docs/RCU/rculist_nulls: Fix hlist_head field name
 of 'obj'

On Tue, Jun 13, 2023 at 06:24:33PM +0000, SeongJae Park wrote:
> The example code snippets on rculist_nulls.rst are assuming 'obj' to
> have the 'hlist_head' field named 'obj_node', but a sentence is wrongly
> mentioning 'obj->obj_node.next' as 'obj->obj_next'.  Fix it.
> 
> Signed-off-by: SeongJae Park <sj@...nel.org>
> Reviewed-by: Joel Fernandes (Google) <joel@...lfernandes.org>
> ---
>  Documentation/RCU/rculist_nulls.rst | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/Documentation/RCU/rculist_nulls.rst b/Documentation/RCU/rculist_nulls.rst
> index 94a8bfe9f560..5cd6f3f8810f 100644
> --- a/Documentation/RCU/rculist_nulls.rst
> +++ b/Documentation/RCU/rculist_nulls.rst
> @@ -86,7 +86,7 @@ Quoting Corey Minyard::
>  2) Insertion algorithm
>  ----------------------
>  
> -We need to make sure a reader cannot read the new 'obj->obj_next' value
> +We need to make sure a reader cannot read the new 'obj->obj_node.next' value

I do like this being more specific, but if we are going do add this
level of specificity, shouldn't we refer to a definition of ->obj_node?

(I queued and pushed 1/4 and 2/4, thank you, and stopped here.)

							Thanx, Paul

>  and previous value of 'obj->key'. Otherwise, an item could be deleted
>  from a chain, and inserted into another chain. If new chain was empty
>  before the move, 'next' pointer is NULL, and lockless reader can not
> -- 
> 2.25.1
>