Re: CVS commit: src/sys/dev/usb

[christos%astron.com@localhost (Christos Zoulas)]

In article <20190106003905.60969FB17%cvs.NetBSD.org@localhost>,
Rin Okuyama <source-changes-d%NetBSD.org@localhost> wrote:
>-=-=-=-=-=-
>
>Module Name:	src
>Committed By:	rin
>Date:		Sun Jan  6 00:39:05 UTC 2019
>
>Modified Files:
>	src/sys/dev/usb: if_axe.c
>
>Log Message:
>Fix kernel panic on arm reported by @furandon_pig on Twitter.
>
>Hardware header is 2-byte aligned in RX buffer, not 4-byte.
>For some architectures, __builtin_memcpy() of GCC 6 attempts to
>copy 4-byte header at once, which results in alignment error.

This is really ugly..

https://stackoverflow.com/questions/24883410/armcc-problems-with-memcpy-alignment-exceptions

Perhaps there is a better solution? Can't memcpy be smarter?

christos