linux-kernel - Re: [PATCH v2] lib/decompress_unxz.c: removing all memory helper functions

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Message-ID: <alpine.LFD.2.02.1206121336060.23555@xanadu.home>
Date:	Tue, 12 Jun 2012 13:44:59 -0400 (EDT)
From:	Nicolas Pitre <nicolas.pitre@...aro.org>
To:	"H. Peter Anvin" <hpa@...or.com>
cc:	Lasse Collin <lasse.collin@...aani.org>,
	T Makphaibulchoke <tmac@...com>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	schwidefsky@...ibm.com, heiko.carstens@...ibm.com,
	linux390@...ibm.com, lethal@...ux-sh.org, tglx@...utronix.de,
	mingo@...hat.com, x86@...nel.org, kaloz@...nwrt.org,
	jj@...osbits.net, matt.fleming@...el.com,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-s390@...r.kernel.org, linux-sh@...r.kernel.org
Subject: Re: [PATCH v2] lib/decompress_unxz.c: removing all memory helper
 functions

On Tue, 12 Jun 2012, H. Peter Anvin wrote:

> On 06/12/2012 10:26 AM, Nicolas Pitre wrote:
> > 
> > Instead of copying, maybe this would be much better to make the content 
> > of lib/string.c usable in a pre-boot environment.
> > 
> 
> Not sure about that... a lot of it is #ifndef __HAVE_ARCH_* and you
> *really* want those optimizations on some arches.

Sure.  What about:

lib/boot/mem.c: lib/string.c
	sed 's/^#ifndef __HAVE_ARCH_/#ifndef __HAVE_PREBOOT_ARCH_/' < $< > $@

This is over simplified but you get the idea.  Maybe lib/string.c itself 
should be split into several files to help with a finer grained 
selection.


Nicolas
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