[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <befa1a39-cfc5-721f-e39a-369436237b1c@wanadoo.fr>
Date: Sun, 4 Sep 2016 17:57:20 +0200
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: linux-kernel@...r.kernel.org
Cc: linux-rdma@...r.kernel.org, netdev@...r.kernel.org,
kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] RDS: Simplify code
Le 04/09/2016 à 14:20, Leon Romanovsky a écrit :
> On Sat, Sep 03, 2016 at 07:33:29AM +0200, Christophe JAILLET wrote:
>> Calling 'list_splice' followed by 'INIT_LIST_HEAD' is equivalent to
>> 'list_splice_init'.
> It is not 100% accurate
>
> list_splice(y, z)
> INIT_LIST_HEAD(y)
>
> ==>
>
> if (!list_empty(y))
> __list_splice(y, z, z>next);
> INIT_LIST_HEAD(y)
>
> and not
>
> if (!list_empty(y)) {
> __list_splice(y, z, z>next);
> INIT_LIST_HEAD(y)
> }
>
> as list_splice_init will do.
>
You are right but if you dig further you will see that calling
INIT_LIST_HEAD on an empty list is a no-op (AFAIK).
And if this list was not already correctly initialized, then you would
have some other troubles.
CJ
Powered by blists - more mailing lists