linux-kernel - Re: [PATCH v2 2/5] firmware: Basic dmi-sysfs support

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Message-ID: <AANLkTinjhY3oiFTq2xq4fwQ-mtLZ8ph435+nc5irM7wZ@mail.gmail.com>
Date:	Wed, 23 Feb 2011 11:43:42 -0800
From:	Tony Luck <tony.luck@...el.com>
To:	Mike Waychison <mikew@...gle.com>
Cc:	Greg KH <greg@...ah.com>, Olof Johansson <olofj@...omium.org>,
	Andi Kleen <andi@...stfloor.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Robert Lippert <rlippert@...gle.com>,
	Jon Mayer <jonmayer@...gle.com>,
	Duncan Laurie <dlaurie@...gle.com>,
	Aaron Durbin <adurbin@...gle.com>,
	linux-kernel@...r.kernel.org, Tim Hockin <thockin@...gle.com>,
	David Hendrix <dhendrix@...omium.org>,
	linux-api@...r.kernel.org
Subject: Re: [PATCH v2 2/5] firmware: Basic dmi-sysfs support

On Tue, Feb 22, 2011 at 5:53 PM, Mike Waychison <mikew@...gle.com> wrote:
> +static void __init dmi_sysfs_register_handle(const struct dmi_header *dh,
> +                                            void *_ret)
> +{

I'm seeing some unaligned references from this function
on ia64.  Code is loading a 2-byte value from an odd
address. We are dereferencing "dh", so looking at the
dmi_header definition, I'd have thought that we must
be touching dh->handle:

struct dmi_header {
        u8 type;
        u8 length;
        u16 handle;
};

I don't see any code in this function that does this,
so I assume there is some inlining or macro stuff
happening.

-Tony
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