linux-kernel - Re: .version keeps being updated

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Date:	Thu, 11 Jan 2007 13:38:24 +0100 (CET)
From:	Roman Zippel <zippel@...ux-m68k.org>
To:	Linus Torvalds <torvalds@...l.org>
cc:	Jean Delvare <khali@...ux-fr.org>,
	Andrey Borzenkov <arvidjaar@...l.ru>,
	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org,
	Andy Whitcroft <apw@...dowen.org>,
	Herbert Poetzl <herbert@...hfloor.at>,
	Olaf Hering <olaf@...fle.de>
Subject: Re: .version keeps being updated

Hi,

On Wed, 10 Jan 2007, Linus Torvalds wrote:

> This part:
> 
> 	const char __init linux_banner[] =
> 
> CANNOT work, because the stupid SuSE tool that look into the kernel binary 
> searches for "Linux version " as the thing, and as such the "linux_banner" 
> has to be the _first_ thing to trigger it for it to work.

Unless the SuSE tool is completely stupid, it should actually work:

$ strings vmlinux | grep "Linux version"
Linux version 2.6.20-rc3-git7 (roman@...id) (gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)) #7 SMP Wed Jan 10 14:20:10 CET 2007
$

> Which is why "__init" is wrong. It causes the linker to either put it at 
> the end of the thing (which would break the SuSE tool). Alternatively it 
> causes section mismatch problems ("init" and "const" don't work that well 
> together), in which case it might work, but only due to toolchain bugs.

The const could be dropped, but it shouldn't hurt much either...

bye, Roman
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