linux-kernel - Re: [PATCH 2/7] linker script: throw away .discard section

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Message-ID: <8bd0f97a0905200059pea3469do9e9b1a7644517558@mail.gmail.com>
Date:	Wed, 20 May 2009 03:59:50 -0400
From:	Mike Frysinger <vapier.adi@...il.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	mingo@...e.hu, linux-kernel@...r.kernel.org, x86@...nel.org,
	ink@...assic.park.msu.ru, rth@...ddle.net, linux@....linux.org.uk,
	hskinnemoen@...el.com, cooloney@...nel.org, starvik@...s.com,
	jesper.nilsson@...s.com, dhowells@...hat.com,
	ysato@...rs.sourceforge.jp, tony.luck@...el.com,
	takata@...ux-m32r.org, geert@...ux-m68k.org, monstr@...str.eu,
	ralf@...ux-mips.org, kyle@...artin.ca, benh@...nel.crashing.org,
	paulus@...ba.org, schwidefsky@...ibm.com,
	heiko.carstens@...ibm.com, lethal@...ux-sh.org,
	davem@...emloft.net, jdike@...toit.com, chris@...kel.net,
	rusty@...tcorp.com.au
Subject: Re: [PATCH 2/7] linker script: throw away .discard section

On Wed, May 20, 2009 at 03:37, Tejun Heo wrote:
> x86 throws away .discard section but no other archs do.  Also,
> .discard is not thrown away while linking modules.  Make every arch
> and module linking throw it away.  This will be used to define dummy
> variables for percpu declarations and definitions.

seems like a good time to introduce a common DISCARD define to
include/asm-generic/vmlinux.lds.h.  considering multiple /DISCARD/
entries are allowed in a linker script, the define should be pretty
straightforward:
#define DISCARDS \
    /DISCARD/ : { \
        EXIT_TEXT \
        EXIT_DATA \
        *(.exitcall.exit) \
        *(.discard) \
    }
-mike
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