linux-kernel - Re: [RFC] move __devinit or __init printk constant format strings to __devinitconst or _

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Message-Id: <1248217502.31365.381.camel@Joe-Laptop.home>
Date:	Tue, 21 Jul 2009 16:05:02 -0700
From:	Joe Perches <joe@...ches.com>
To:	Matt Mackall <mpm@...enic.com>
Cc:	linux-embedded@...r.kernel.org, linux-kernel@...r.kernel.org,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Tim Bird <tim.bird@...sony.com>
Subject: Re: [RFC] move __devinit or __init printk constant format strings
 to __devinitconst or __initdata?

On Tue, 2009-07-21 at 17:57 -0500, Matt Mackall wrote:
> On Tue, 2009-07-21 at 14:56 -0700, Joe Perches wrote:
> > On Tue, 2009-07-21 at 16:48 -0500, Matt Mackall wrote:
> > > On Tue, 2009-07-21 at 14:20 -0700, Joe Perches wrote:
> > > > Is moving constant string formats to __devinitconst or __initdata
> > > > useful for embedded environments?
> > > Interesting notion, but not worth the trouble in my mind. I think it's
> > > more worthwhile to look into automatic such stuff in the build somehow.
> > I think it's not possible today to get gcc to mark
> > the format strings without source modification.
> Yep, that's why I specifically said 'build'. It can probably be done in
> a post-processing step with some ELF wizardry. 

Know any elven wizards?

> > It's pretty easy to script a source conversion.
> 
> And that script has to be run how often?

Once.

>  I don't think people will find
> the churn (and general extra ugliness) acceptable. For a typical
> stripped-down embedded kernel, the amount of gain here will be fairly
> minimal. I'd be surprised if you got as much as 1K out of it.

Got a typical config that uses printks I could try?


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