netdev - Re: [PATCH net v1] dim: initialize all struct fields

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Date:   Fri, 6 May 2022 08:28:39 -0700
From:   Jesse Brandeburg <jesse.brandeburg@...el.com>
To:     Jakub Kicinski <kuba@...nel.org>
CC:     <netdev@...r.kernel.org>, <alexandr.lobakin@...el.com>
Subject: Re: [PATCH net v1] dim: initialize all struct fields

On 5/5/2022 6:40 PM, Jakub Kicinski wrote:

>>   #define NET_DIM_RX_EQE_PROFILES { \
>> -	{1,   NET_DIM_DEFAULT_RX_CQ_MODERATION_PKTS_FROM_EQE}, \
>> -	{8,   NET_DIM_DEFAULT_RX_CQ_MODERATION_PKTS_FROM_EQE}, \
>> -	{64,  NET_DIM_DEFAULT_RX_CQ_MODERATION_PKTS_FROM_EQE}, \
>> -	{128, NET_DIM_DEFAULT_RX_CQ_MODERATION_PKTS_FROM_EQE}, \
>> -	{256, NET_DIM_DEFAULT_RX_CQ_MODERATION_PKTS_FROM_EQE}, \
>> +	DIM_CQ_MODER(1,   NET_DIM_DEFAULT_RX_CQ_PKTS_FROM_EQE, 0, 0), \
>> +	DIM_CQ_MODER(8,   NET_DIM_DEFAULT_RX_CQ_PKTS_FROM_EQE, 0, 0), \
>> +	DIM_CQ_MODER(64,  NET_DIM_DEFAULT_RX_CQ_PKTS_FROM_EQE, 0, 0), \
>> +	DIM_CQ_MODER(128, NET_DIM_DEFAULT_RX_CQ_PKTS_FROM_EQE, 0, 0), \
>> +	DIM_CQ_MODER(256, NET_DIM_DEFAULT_RX_CQ_PKTS_FROM_EQE, 0, 0)  \
>>   }
> 
> That may give people the false impression that we always have
> to initialize all the fields to appease W=2. The most common
> way of fixing this warning is to tell the compiler that we know
> what we're doing and add a comma after the last member:
> 
> -	{2,  256},             \
> +	{2,  256,},             \
> 
> The commit message needs to at least discuss why this direction
> was not taken. My preference would actually be to do it, tho.

Ok, I'll make that change, thanks for the feedback.

> 
> Also please CC maintainers and authors of patches under Fixes:.

Yeah, my mistake and I'll fix that on the v2!

Jesse