linux-kernel - Re: [net-next 1/6] net: marvell: prestera: Add driver for Prestera family ASIC devices

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Date:   Sat, 30 May 2020 03:46:22 +0300
From:   Vadym Kochan <vadym.kochan@...ision.eu>
To:     David Miller <davem@...emloft.net>
Cc:     kuba@...nel.org, jiri@...lanox.com, idosch@...lanox.com,
        andrew@...n.ch, oleksandr.mazur@...ision.eu,
        serhiy.boiko@...ision.eu, serhiy.pshyk@...ision.eu,
        volodymyr.mytnyk@...ision.eu, taras.chornyi@...ision.eu,
        andrii.savka@...ision.eu, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, mickeyr@...vell.com
Subject: Re: [net-next 1/6] net: marvell: prestera: Add driver for Prestera
 family ASIC devices

Hi David,

On Fri, May 29, 2020 at 05:18:39PM -0700, David Miller wrote:
> 
> Please remove all of the __packed attributes.
> 
> I looked at your data structures and all of them use fixed sized types
> and are multiples of 4 so the __packed attribute is completely
> unnecessary.
> 
> The alignment attribute is also unnecessary so please remove that too.

Some of the fields are u8, so I assume there might be holes added by
the compiler ? Also these attributes guarantee some ABI compatibility
with FW side, I will try to remove them and check but it sounds for me a bit
risky.