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From: Andi Kleen <ak@muc.de>
To: Andrew Morton <akpm@osdl.org>
Cc: linux-kernel@vger.kernel.org, davidm@napali.hpl.hp.com
Subject: Re: [PATCH] fixing sendfile on 64bit architectures
Date: Fri, 21 May 2004 11:01:15 +0200	[thread overview]
Message-ID: <m3fz9uxig4.fsf@averell.firstfloor.org> (raw)
In-Reply-To: <1Y3Ki-6x6-35@gated-at.bofh.it> (Andrew Morton's message of "Fri, 21 May 2004 00:00:18 +0200")

Andrew Morton <akpm@osdl.org> writes:
>
> An alternative might be to remove all the ifdefs, build with
> -ffunction-sections and let the linker drop any unreferenced code...

I am not sure if it will handle EXPORT_SYMBOL correctly. Sometimes
we have the situation that a function is only referenced from EXPORT_SYMBOL,
but we do not want the linker to drop it because modules may use it.
(this regularly causes problems in lib-y files) 

If it did it would be great to use though. I am sure there are other
dead functions around too. Or maybe someday we could even use the 
IPA functionality in gcc 3.4 ... 

-Andi


       reply	other threads:[~2004-05-21 22:35 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <1Y1yE-4Lz-7@gated-at.bofh.it>
     [not found] ` <1Y1yF-4Lz-9@gated-at.bofh.it>
     [not found]   ` <1Y1yF-4Lz-11@gated-at.bofh.it>
     [not found]     ` <1Y1yF-4Lz-13@gated-at.bofh.it>
     [not found]       ` <1Y1yF-4Lz-15@gated-at.bofh.it>
     [not found]         ` <1Y1yE-4Lz-5@gated-at.bofh.it>
     [not found]           ` <1Y1yJ-4Lz-37@gated-at.bofh.it>
     [not found]             ` <1Y2l5-5rr-5@gated-at.bofh.it>
     [not found]               ` <1Y3Ki-6x6-35@gated-at.bofh.it>
2004-05-21  9:01                 ` Andi Kleen [this message]
     [not found] <26879984$108499340940abaf81679ba6.07529629@config22.schlund.de>
     [not found] ` <16556.19979.951743.994128@napali.hpl.hp.com>
     [not found]   ` <20040519234106.52b6db78.davem@redhat.com>
     [not found]     ` <16556.65456.624986.552865@napali.hpl.hp.com>
     [not found]       ` <20040520120645.3accf048.akpm@osdl.org>
2004-05-20 19:26         ` David Mosberger
2004-05-20 19:35           ` Christoph Hellwig
2004-05-20 20:17             ` David Mosberger
2004-05-20 21:56               ` Andrew Morton
2004-05-20 22:00                 ` David Mosberger
2004-05-20 22:09                 ` David Mosberger
2004-05-20 23:30                   ` Andrew Morton
2004-05-20 23:44                     ` David Mosberger
2004-05-20 22:10                 ` Jesse Barnes
2004-05-20 22:25                   ` Andrew Morton
2004-05-20 22:32                     ` David Mosberger
2004-05-20 22:33                     ` Jesse Barnes

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