netdev - Re: [patch net-next v2 04/10] net: sched: replace nprio by a bool to make the function more readable

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Date:   Tue, 16 May 2017 08:56:22 -0400
From:   Jamal Hadi Salim <jhs@...atatu.com>
To:     Jiri Pirko <jiri@...nulli.us>
Cc:     netdev@...r.kernel.org, davem@...emloft.net,
        xiyou.wangcong@...il.com, dsa@...ulusnetworks.com,
        edumazet@...gle.com, stephen@...workplumber.org,
        daniel@...earbox.net, alexander.h.duyck@...el.com,
        simon.horman@...ronome.com, mlxsw@...lanox.com
Subject: Re: [patch net-next v2 04/10] net: sched: replace nprio by a bool to
 make the function more readable

On 17-05-16 08:25 AM, Jiri Pirko wrote:
> Tue, May 16, 2017 at 02:09:25PM CEST, jhs@...atatu.com wrote:
>> On 17-05-15 04:38 AM, Jiri Pirko wrote:
>>
>>> diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
>>> index 88ec1a1..0e49e6e 100644
>>> --- a/net/sched/cls_api.c
>>> +++ b/net/sched/cls_api.c
>>> @@ -271,7 +271,7 @@ static int tc_ctl_tfilter(struct sk_buff *skb, struct nlmsghdr *n,
>>>  	struct tcmsg *t;
>>>  	u32 protocol;
>>>  	u32 prio;
>>> -	u32 nprio;
>>> +	bool prio_allocate;
>>
>> prio_allocated? (past tense seems more sensible)
>
> No, it actually tell if the prio should be allocated:
>
>                 if (prio_allocate)
>                         prio = tcf_auto_prio(tcf_chain_tp_prev(&chain_info));
>
> I believe it is accurate.
>

Your mileage may vary, this chunk:
===
  			if (n->nlmsg_flags & NLM_F_CREATE) {
  				prio = TC_H_MAKE(0x80000000U, 0U);
+				prio_allocate = true;
  				break;
  			}

in which prio is used subsequently before the chunk you refer to
allocates implies the prio is already allocated.
Your call really.

I will review more later.

cheers,
jamal

cheers,
jamal