netdev - Re: [PATCH] batman-adv: Use kasprintf

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Date:	Sat, 28 Jun 2014 21:49:22 +0200
From:	Antonio Quartulli <antonio@...hcoding.com>
To:	Joe Perches <joe@...ches.com>,
	Himangi Saraogi <himangi774@...il.com>
CC:	Marek Lindner <mareklindner@...mailbox.ch>,
	Simon Wunderlich <sw@...onwunderlich.de>,
	"David S. Miller" <davem@...emloft.net>,
	b.a.t.m.a.n@...ts.open-mesh.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, julia.lawall@...6.fr
Subject: Re: [PATCH] batman-adv: Use kasprintf

Hi all,

On 28/06/14 21:13, Joe Perches wrote:
> diff --git a/net/batman-adv/sysfs.c b/net/batman-adv/sysfs.c
> index f40cb04..d6fba94 100644
> --- a/net/batman-adv/sysfs.c
> +++ b/net/batman-adv/sysfs.c
> @@ -896,7 +896,7 @@ int batadv_throw_uevent(struct batadv_priv *bat_priv, enum batadv_uev_type type,
>  {
>  	int ret = -ENOMEM;
>  	struct kobject *bat_kobj;
> -	char *uevent_env[4] = { NULL, NULL, NULL, NULL };
> +	char *uevent_env[3];


Joe, why are you shortening this? kobject_uevent_env() expect a
NULL-terminating array (that is the forth cell).

...

>  
>  	ret = kobject_uevent_env(bat_kobj, KOBJ_CHANGE, uevent_env);

And how is this change reducing the code space?

For what concerns the labels, we use this pattern mostly all over the
code: one single label/exit-point with the related NULL checks. Do you
think that we can improve something by changing this? (I am not talking
about the fastpath here).


Cheers,

-- 
Antonio Quartulli


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