Re: [PATCH net 4/5] net/smc: atomic SMCD cursor handling

[David Miller]

From: Ursula Braun <ubr...@linux.ibm.com>
Date: Mon, 12 Nov 2018 17:01:32 +0100

> +/* SMC-D cursor format */
> +union smcd_cdc_cursor {
 ...
> +} __aligned(8);

>  struct smcd_cdc_msg {
 ...
> +     union smcd_cdc_cursor   prod;
> +     union smcd_cdc_cursor   cons;
>       u8 res3[8];
>  } __packed;

You're asking for 8-byte alignment of an object you only embed in a
__packed structure, which therefore has arbitary alignment.

It's not going to work.