Subject: Re: [PATCH] drivers: staging: lustre: lustre: include: add "__attribute__((packed))" for the related union

From: Dan Carpenter <[email-masked]>
Date: Mon, 3 Feb 2014 11:58:55 +0300

On Sat, Feb 01, 2014 at 09:57:39PM +0800, Chen Gang wrote:
> It seems, our kernel still stick to treate 'pack' region have effect
> with both 'align' and 'sizeof'.
> 

It's not about packed regions.  It's about unions.  It's saying the
sizeof() a union is a multiple of 4 unless it's packed.

union foo {
	short x;
	short y;
};

The author intended the sizeof(union foo) to be 2 but on metag arch then
it is 4.

regards,
dan carpenter