linux-kernel - Re: [PATCH] net: codel: fix build errors

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Date:	Mon, 14 May 2012 23:08:03 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Sasha Levin <levinsasha928@...il.com>
Cc:	edumazet@...gle.com, dave.taht@...ferbloat.net,
	davem@...emloft.net, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH] net: codel: fix build errors

On Mon, 2012-05-14 at 19:14 +0200, Sasha Levin wrote:
> Fix the following build error:
> 
> net/sched/sch_fq_codel.c: In function 'fq_codel_dump_stats':
> net/sched/sch_fq_codel.c:464:3: error: unknown field 'qdisc_stats' specified in initializer
> net/sched/sch_fq_codel.c:464:3: warning: missing braces around initializer
> net/sched/sch_fq_codel.c:464:3: warning: (near initialization for 'st.<anonymous>')
> net/sched/sch_fq_codel.c:465:3: error: unknown field 'qdisc_stats' specified in initializer
> net/sched/sch_fq_codel.c:465:3: warning: excess elements in struct initializer
> net/sched/sch_fq_codel.c:465:3: warning: (near initialization for 'st')
> net/sched/sch_fq_codel.c:466:3: error: unknown field 'qdisc_stats' specified in initializer
> net/sched/sch_fq_codel.c:466:3: warning: excess elements in struct initializer
> net/sched/sch_fq_codel.c:466:3: warning: (near initialization for 'st')
> net/sched/sch_fq_codel.c:467:3: error: unknown field 'qdisc_stats' specified in initializer
> net/sched/sch_fq_codel.c:467:3: warning: excess elements in struct initializer
> net/sched/sch_fq_codel.c:467:3: warning: (near initialization for 'st')
> make[1]: *** [net/sched/sch_fq_codel.o] Error 1
> 
> Signed-off-by: Sasha Levin <levinsasha928@...il.com>
> ---
>  include/linux/pkt_sched.h |    4 +++-
>  1 files changed, 3 insertions(+), 1 deletions(-)
> 
> diff --git a/include/linux/pkt_sched.h b/include/linux/pkt_sched.h
> index 32aef0a..c304eda 100644
> --- a/include/linux/pkt_sched.h
> +++ b/include/linux/pkt_sched.h
> @@ -732,7 +732,9 @@ struct tc_fq_codel_xstats {
>  	union {
>  		struct tc_fq_codel_qd_stats qdisc_stats;
>  		struct tc_fq_codel_cl_stats class_stats;
> -	};
> +	} u;
> +#define qdisc_stats u.qdisc_stats
> +#define class_stats u.class_stats
>  };
>  

Anonymous unions are fine, we use them a lot in kernel.

Please fix the initializers instead in fq_codel_dump_stats(), because
these two #define are not very nice.




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