linux-kernel - Re: [PATCH] (updated, rolled up) make section names compatible with -ffunction-sections -fdata-sections

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Message-ID: <14472.1216381988@redhat.com>
Date:	Fri, 18 Jul 2008 12:53:08 +0100
From:	David Howells <dhowells@...hat.com>
To:	Denys Vlasenko <vda.linux@...glemail.com>
Cc:	dhowells@...hat.com, Andrew Morton <akpm@...ux-foundation.org>,
	mingo@...e.hu, x86@...nel.org,
	James Bottomley <James.Bottomley@...senpartnership.com>,
	Russell King <rmk@....linux.org.uk>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Lennert Buytenhek <kernel@...tstofly.org>,
	Josh Boyer <jwboyer@...ux.vnet.ibm.com>,
	Paul Mackerras <paulus@...ba.org>,
	David Woodhouse <dwmw2@...radead.org>,
	Andi Kleen <andi@...stfloor.org>,
	torvalds@...ux-foundation.org,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	linux-embedded@...r.kernel.org, linux-kernel@...r.kernel.org,
	Tim Bird <tim.bird@...sony.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Dave Miller <davem@...emloft.net>
Subject: Re: [PATCH] (updated, rolled up) make section names compatible with -ffunction-sections -fdata-sections

Denys Vlasenko <vda.linux@...glemail.com> wrote:

> The purpose of these patches is to make kernel buildable
> with "gcc -ffunction-sections -fdata-sections".
> 
> The problem is that with -ffunction-sections -fdata-sections gcc
> creates sections like .text.head and .data.nosave
> whenever someone has innocuous code like this:
> 
> static void head(...) {...}
> 
> or this:
> 
> int f(...) { static int nosave; ... }
> 
> somewhere in the kernel.
> 
> Kernel linker script is confused by such names and puts these sections
> in wrong places.
> 
> This patch renames all "magic" section names used by kernel
> to not have this format, eliminating the possibility of such collisions.
> 
> Signed-off-by: Denys Vlasenko <vda.linux@...glemail.com>

Acked-by: David Howells <dhowells@...hat.com> [FRV and MN10300]
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