linux-kernel - Re: [PATCH] USB: ehci: use packed,aligned(4) instead of removing the packed attribute

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <4DFF9568.8030704@ahsoftware.de>
Date:	Mon, 20 Jun 2011 20:46:00 +0200
From:	Alexander Holler <holler@...oftware.de>
To:	Alan Stern <stern@...land.harvard.edu>
CC:	Nicolas Pitre <nico@...xnic.net>, Arnd Bergmann <arnd@...db.de>,
	linux-arm-kernel@...ts.infradead.org, linux-usb@...r.kernel.org,
	gregkh@...e.de, lkml <linux-kernel@...r.kernel.org>,
	Rabin Vincent <rabin@....in>
Subject: Re: [PATCH] USB: ehci: use packed,aligned(4) instead of removing
 the packed attribute

Am 20.06.2011 20:39, schrieb Alan Stern:
> On Mon, 20 Jun 2011, Alexander Holler wrote:
>
>> I see it that way: packed is needed to be sure that at least for struct
>> ehci_regs there are no padding bytes inbetween the members.
>
> But is it _really_ needed?
>
>> It might
>> work without, but that depends on the compiler (-version, architecture,
>> whatever).
>
> Have there _ever_ been _any_ combinations of compiler, version,
> architecture, whatever, that had unwanted padding bytes in this
> structure?

I don't know. But if there would be no doubts, this discussion would not 
happen and I assume there never would have been an attribute packed there.

Regards,

Alexander
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/