linux-kernel - Re: [PATCH 14/23] make section names compatible with -ffunction-sections -fdata-sections: parisc

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Message-Id: <1214955660.3316.31.camel@localhost.localdomain>
Date:	Tue, 01 Jul 2008 18:41:00 -0500
From:	James Bottomley <James.Bottomley@...senPartnership.com>
To:	Denys Vlasenko <vda.linux@...glemail.com>
Cc:	linux-arch@...r.kernel.org, Russell King <rmk@....linux.org.uk>,
	David Howells <dhowells@...hat.com>,
	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, akpm@...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 14/23] make section names compatible with
	-ffunction-sections -fdata-sections: parisc

On Wed, 2008-07-02 at 02:39 +0200, Denys Vlasenko wrote:
> The purpose of this patch is to make kernel buildable
> with "gcc -ffunction-sections -fdata-sections".
> This patch fixes parisc architecture.
> 
> Signed-off-by: Denys Vlasenko <vda.linux@...glemail.com>

Um ... if you look at the Makefile you'll see we already build parisc
with -ffunction-sections; we have to: our relative jumps are too small
to guarantee finding the stubs in large files.

Since our text is -ffunction-sections compatible already, I question the
need for transformations like this:

> -               *(.text.do_softirq)
> -               *(.text.sys_exit)
> -               *(.text.do_sigaltstack)
> -               *(.text.do_fork)
> +               *(.do_softirq.text)
> +               *(.sys_exit.text)
> +               *(.do_sigaltstack.text)
> +               *(.do_fork.text)

And thus by the same token the data transformations.

James


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