Subject: Re: [RFC] move __devinit or __init printk constant format strings
 to __devinitconst or __initdata?
From: Joe Perches <joe@perches.com>
To: Matt Mackall <mpm@selenic.com>
Cc: David Daney <ddaney@caviumnetworks.com>, linux-embedded@vger.kernel.org,
       linux-kernel@vger.kernel.org,
       Paul Gortmaker <paul.gortmaker@windriver.com>,
       David Woodhouse <dwmw2@infradead.org>, Tim Bird <tim.bird@am.sony.com>
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Date: Tue, 21 Jul 2009 21:50:02 -0700
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On Tue, 2009-07-21 at 20:28 -0500, Matt Mackall wrote:
> On Tue, 2009-07-21 at 16:50 -0700, David Daney wrote:
> > It would be tricky, the string data from the entire compilation unit is 
> > intermingled.  You would have to separate out only those strings 
> > referenced from __init sections into their own section and fix up all 
> > symbols and relocations that were affected.
> Exactly. Annoying but not impossible.

But faster and likely easier to do once in source.

> > Probably easier would be to use the plug-in feature that will be part of 
> > GCC-4.5 (or will that be called GCC-5.0??), and create a special Linux 
> > kernel GCC plug-in that just emits the __init literal strings to the 
> > proper section to begin with.

Which is what the proposed marking would
more or less do today.

> > We don't want the kernel to get left 
> > behind in the GCC plug-in race.

Any guess when gcc 4.5/5.0 might become available?
It's in stage 1 now.  Mid 2010 or so?

4.4.0 was April 21, 2009
4.3.0 was March 5, 2008
4.2.0 was May 13, 2007

Could you please send me what you think is a
reasonable .config for an embedded box.

cheers, Joe

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