linux-kernel - Re: [PATCH 05/15] arm: convert to use __HEAD and HEAD

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Message-ID: <20090427170017.GB30189@flint.arm.linux.org.uk>
Date:	Mon, 27 Apr 2009 18:00:17 +0100
From:	Russell King <rmk+lkml@....linux.org.uk>
To:	Tim Abbott <tabbott@....EDU>
Cc:	Sam Ravnborg <sam@...nborg.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Anders Kaseorg <andersk@....edu>,
	Waseem Daher <wdaher@....edu>,
	Denys Vlasenko <vda.linux@...glemail.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Andi Kleen <andi@...stfloor.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Jeff Arnold <jbarnold@....edu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jon Masters <jonathan@...masters.org>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Theodore Ts'o <tytso@....edu>,
	Nikanth Karthikesan <knikanth@...e.de>,
	Arjan van de Ven <arjan@...radead.org>,
	Paul Mundt <lethal@...ux-sh.org>,
	Américo Wang <xiyou.wangcong@...il.com>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Kyle McMartin <kyle@...artin.ca>,
	David Howells <dhowells@...hat.com>,
	Tony Luck <tony.luck@...el.com>
Subject: Re: [PATCH 05/15] arm: convert to use __HEAD and HEAD_TEXT macros.

On Mon, Apr 27, 2009 at 12:46:21PM -0400, Tim Abbott wrote:
> On Sun, 26 Apr 2009, Sam Ravnborg wrote:
> 
> > > -	.text.head : {
> > > +	HEAD_TEXT_SECTION : {
> > 
> > Spell it out direct rather than hiding the .head.text
> > behind a macro name here.
> 
> Does .head.text actually need its own output section here?  I notice that 
> only the linker scripts for arm, x86, and ia64 have an output section for 
> .head.text; the rest just place it at the start of the .text or .init.text 
> output section.  It would be great if we could eliminate these extra 
> references to .head.text by doing the same thing here.

It could be merged with the .init section.  IOW, it becomes:

        .init : {                       /* Init code and data           */
                _stext = .;
                _sinittext = .;
                *(.text.head)
                        INIT_TEXT
                _einittext = .;
                __proc_info_begin = .;
                        *(.proc.info.init)
                __proc_info_end = .;
...

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:
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