linux-kernel - Re: [RFC] arm: use built-in byte swap function

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Message-ID: <1360344301.6066.263.camel@shinybook.infradead.org>
Date:	Fri, 8 Feb 2013 17:25:17 +0000
From:	"Woodhouse, David" <david.woodhouse@...el.com>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
CC:	Kim Phillips <kim.phillips@...escale.com>,
	Borislav Petkov <bp@...en8.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Daniel Santos <daniel.santos@...ox.com>,
	David Rientjes <rientjes@...gle.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Rob Herring <robherring2@...il.com>
Subject: Re: [RFC] arm: use built-in byte swap function

On Thu, 2013-02-07 at 18:13 +0000, Russell King - ARM Linux wrote:
> 
> However, the biggest reason not to use libgcc is that we want to control
> what gets used in the kernel - for example, no floating point, and no
> use of 64 x 64bit division.

Which is all very sensible. But there's no particular reason we couldn't
add a __bswap[sd]i2 to the kernel's version of libgcc if we wanted to.

If we're compiling with -Os  on platforms without 'rev' and that's the
thing that makes most sense, then we should make it work.

-- 
                   Sent with MeeGo's ActiveSync support.

David Woodhouse                            Open Source Technology Centre
David.Woodhouse@...el.com                              Intel Corporation




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