linux-kernel - Re: String literals in _

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Message-ID: <1427407120.15849.34.camel@perches.com>
Date:	Thu, 26 Mar 2015 14:58:40 -0700
From:	Joe Perches <joe@...ches.com>
To:	Andrew Morton <akpm@...ux-foundation.org>, gcc@....gnu.org
Cc:	Mathias Krause <minipli@...glemail.com>, Mason <slash.tmp@...e.fr>,
	Linux ARM <linux-arm-kernel@...ts.infradead.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: String literals in __init functions

(adding gcc@....gnu.org)

On Thu, 2015-03-26 at 14:40 -0700, Andrew Morton wrote:
> On Thu, 26 Mar 2015 21:49:06 +0100 Mathias Krause <minipli@...glemail.com> wrote:
> 
> > Andrew, what's your opinion on such a patch set? Do you too think it's
> > useful? Or do you share Ingo's fear about the additional maintenance
> > burden?
> 
> I don't think the burden would be toooo high, although it will mess the
> code up a bit.

I think it's overall a pretty low cost one-time pass
that Mathias has nearly completely automated.

Even if a future version of gcc implements string
constants in specific sections, the code isn't
difficult to understand or maintain for older versions.

> The post-build checking for section reference mismatches will help,
> although that seems to have got itself turned off (what happened
> there?).

I think the modprobe message works well.
What do you think missing?

> Did anyone ask the gcc developers?

Not to my knowledge.

> I'd have thought that a function-wide
> 	__attribute__((__string_section__(foo))
> wouldn't be a ton of work to implement.

Maybe not.

Could some future version of gcc move string constants
in a function to a specific section marked in a manner
similar to what Andrew described above?


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