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SubjectRE: [ACPI] [PATCH] 1/3 ACPI resource handling
Date
This is worth looking into, anyway.
memcpy is appropriate, also.
Bob


-----Original Message-----
From: Bjorn Helgaas [mailto:bjorn_helgaas@hp.com]
Sent: Friday, February 21, 2003 2:37 PM
To: Matthew Wilcox
Cc: Moore, Robert; Grover, Andrew; Walz, Michael; t-kochi@bq.jp.nec.com;
linux-kernel@vger.kernel.org; acpi-devel@lists.sourceforge.net
Subject: Re: [ACPI] [PATCH] 1/3 ACPI resource handling

On Friday 21 February 2003 3:15 pm, Matthew Wilcox wrote:
> On Fri, Feb 21, 2003 at 03:09:15PM -0700, Bjorn Helgaas wrote:
> > Or, since you mention a macro, maybe your question is not about
> > the usefulness of acpi_resource_to_address64() itself, but about
> > how I implemented it, namely, with the copy_field and copy_address
> > macros:
>
> Can I suggest that you do a simple memcpy() for the case where you're
> translating an address64 into an address64?

I suppose we could. Or maybe we should just get to the root of the
thing and make a generic acpi_resource_address structure and never
even expose the 16, 32, and 64 bit variants. As far as I can tell,
they just make life difficult for consumers.

Then acpi_rs_address16_resource(), acpi_rs_address32_resource(),
and acpi_rs_address64_resource() could be collapsed into one function
with pretty trivial checks for the different sizes. And there's lots
of similar collapsing that could be done. I bet we'd even find one
or two defects in the process of removing all the duplicated code.

Of course, I guess that would change the CA interface, so that
constrains things a bit.

Bjorn
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