Re: [PATCH nf-next] netfilter: xt_nfacct: Use not operation instead of condition check

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Hi Florian,

On Mon, Sep 26, 2016 at 11:17 PM, Florian Westphal <fw@xxxxxxxxx> wrote:
> fgao@xxxxxxxxxx <fgao@xxxxxxxxxx> wrote:
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/net/netfilter/xt_nfacct.c b/net/netfilter/xt_nfacct.c
>> index cf32759..7abb5b5 100644
>> --- a/net/netfilter/xt_nfacct.c
>> +++ b/net/netfilter/xt_nfacct.c
>> @@ -28,7 +28,7 @@ static bool nfacct_mt(const struct sk_buff *skb, struct xt_action_param *par)
>>
>>       overquota = nfnl_acct_overquota(par->net, skb, info->nfacct);
>>
>> -     return overquota == NFACCT_UNDERQUOTA ? false : true;
>> +     return !(overquota == NFACCT_UNDERQUOTA);
>
> I don't find one better than the other.  If you need to change
> it for some reason consider
>
> "return overquota != NFACCT_UNDERQUOTA"
>
> instead of this strange negation.

Thanks, it is more simple use "!=".

>
> But really, I think its fine as-is.

It could decrease one condition check and jump.


Regards
Feng


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