Re: [PATCH] RDS: Simplify code

[Christophe JAILLET]

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