linux-kernel - Re: [PATCH] mac80211: Directly use ida

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Date:   Fri, 27 May 2022 09:32:30 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     liuke94@...wei.com
Cc:     davem@...emloft.net, edumazet@...gle.com,
        johannes@...solutions.net, kuba@...nel.org, kvalo@...nel.org,
        linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org, pabeni@...hat.com
Subject: Re: [PATCH] mac80211: Directly use ida_alloc()/free()

Hi,

Le 27/05/2022 à 09:41, keliu a écrit :
> Use ida_alloc()/ida_free() instead of deprecated
> ida_simple_get()/ida_simple_remove() .
> 
> Signed-off-by: keliu <liuke94-hv44wF8Li93QT0dZR+AlfA@...lic.gmane.org>
> ---
>   drivers/net/wireless/mac80211_hwsim.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
> index e9ec63e0e395..6ad884d9e9a4 100644
> --- a/drivers/net/wireless/mac80211_hwsim.c
> +++ b/drivers/net/wireless/mac80211_hwsim.c
> @@ -290,8 +290,8 @@ static inline int hwsim_net_set_netgroup(struct net *net)
>   {
>   	struct hwsim_net *hwsim_net = net_generic(net, hwsim_net_id);
>   
> -	hwsim_net->netgroup = ida_simple_get(&hwsim_netgroup_ida,
> -					     0, 0, GFP_KERNEL);
> +	hwsim_net->netgroup = ida_alloc(&hwsim_netgroup_ida,
> +					     GFP_KERNEL);
Nitpick: GFP_KERNEL should be on the same line if there is enough space 
or aligned with &hwsim_netgroup_ida


Out of curiosity, how do you generate these patches?
(coccinelle should be the perfect tool for it, but I thought it would 
already deal with alignment)

CJ

>   	return hwsim_net->netgroup >= 0 ? 0 : -ENOMEM;
>   }
>   
> @@ -4733,7 +4733,7 @@ static void __net_exit hwsim_exit_net(struct net *net)
>   					 NULL);
>   	}
>   
> -	ida_simple_remove(&hwsim_netgroup_ida, hwsim_net_get_netgroup(net));
> +	ida_free(&hwsim_netgroup_ida, hwsim_net_get_netgroup(net));
>   }
>   
>   static struct pernet_operations hwsim_net_ops = {