netdev - Re: net-next build failure due to 16e5cc64?

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Date:	Tue, 1 Mar 2016 10:51:53 -0800
From:	Cong Wang <xiyou.wangcong@...il.com>
To:	Sowmini Varadhan <sowmini.varadhan@...cle.com>
Cc:	Linux Kernel Network Developers <netdev@...r.kernel.org>,
	john fastabend <john.fastabend@...il.com>,
	John Fastabend <john.r.fastabend@...el.com>
Subject: Re: net-next build failure due to 16e5cc64?

On Tue, Mar 1, 2016 at 10:41 AM, Sowmini Varadhan
<sowmini.varadhan@...cle.com> wrote:
> On (03/01/16 10:23), Cong Wang wrote:
>> > The compiler error is for fields within the union which lacks
>> > both a tag and a union-name.  So I'm not sure how the above will
>> > help.
>> >
>>
>> Come on.. we have plenty of such anonymous unions in skbuff.h...
>
> I realize that, even netdevice.h itself has other instances.
> Thus I dont understand why this one generated a compiler error
> for me.  Thus I was wondering why others had not run into this
> and not suggesting it should be patched.
>
> However, changing the way we set up type etc. doesnt seem relevant
> to what the compiler is flagging.
>

Clearly the compiler indicates something is wrong in the initializer.

I don't know why you don't want to try the way I suggest or maybe
the following:

diff --git a/net/sched/sch_mqprio.c b/net/sched/sch_mqprio.c
index f9947d1..77743e8 100644
--- a/net/sched/sch_mqprio.c
+++ b/net/sched/sch_mqprio.c
@@ -142,7 +142,7 @@ static int mqprio_init(struct Qdisc *sch, struct
nlattr *opt)
         */
        if (qopt->hw) {
                struct tc_to_netdev tc = {.type = TC_SETUP_MQPRIO,
-                                         .tc = qopt->num_tc};
+                                         {.tc = qopt->num_tc} };

                priv->hw_owned = 1;
                err = dev->netdev_ops->ndo_setup_tc(dev, sch->handle, 0, &tc);