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Message-ID: <20210324095725.ro5zs2qnmhemzvts@pengutronix.de>
Date: Wed, 24 Mar 2021 10:57:25 +0100
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: Oliver Hartkopp <socketcan@...tkopp.net>
Cc: Rasmus Villemoes <linux@...musvillemoes.dk>,
Rong Chen <rong.a.chen@...el.com>,
Patrick Menschel <menschel.p@...teo.de>,
kernel test robot <lkp@...el.com>, kbuild-all@...ts.01.org,
linux-kernel@...r.kernel.org, linux-can <linux-can@...r.kernel.org>
Subject: Re: [kbuild-all] Re: include/linux/compiler_types.h:315:38: error:
call to '__compiletime_assert_536' declared with attribute error:
BUILD_BUG_ON failed: offsetof(struct can_frame, len) != offsetof(struct
canfd_frame, len) || offsetof(struct can_frame, data) != offsetof(struc...
On 24.03.2021 10:09:22, Oliver Hartkopp wrote:
> @Marc: Looks like we can not get around the __packed() fix :-(
>
> At least we now have some more documentation to be referenced and I would
> suggest to point out that some compilers handle the union alignment like
> this.
It's not the compiler, but the ABI.
> To make clear in the comments what we are suppressing here any why.
Feel free to post an updated patch description.
Marc
--
Pengutronix e.K. | Marc Kleine-Budde |
Embedded Linux | https://www.pengutronix.de |
Vertretung West/Dortmund | Phone: +49-231-2826-924 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
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