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Message-ID: <20131105154539.571de66098b77166db039a3b@freescale.com>
Date: Tue, 5 Nov 2013 15:45:39 -0600
From: Kim Phillips <kim.phillips@...escale.com>
To: Nicolas Pitre <nico@...xnic.net>
CC: "Woodhouse, David" <david.woodhouse@...el.com>,
Russell King - ARM Linux <linux@....linux.org.uk>,
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: [PATCH v7] arm: use built-in byte swap function
On Sat, 26 Oct 2013 22:41:34 -0400
Nicolas Pitre <nico@...xnic.net> wrote:
> On Thu, 23 May 2013, Kim Phillips wrote:
>
> > Enable the compiler intrinsic for byte swapping on arch ARM. This
> > allows the compiler to detect and be able to optimize out byte
> > swappings, and has a very modest benefit on vmlinux size (Linaro gcc
> > 4.8):
> >
> > text data bss dec hex filename
> > 2840310 123932 61960 3026202 2e2d1a vmlinux-lart #orig
> > 2840152 123932 61960 3026044 2e2c7c vmlinux-lart #builtin-bswap
> >
> > 6473120 314840 5616016 12403976 bd4508 vmlinux-mxs #orig
> > 6472586 314848 5616016 12403450 bd42fa vmlinux-mxs #builtin-bswap
> >
> > 7419872 318372 379556 8117800 7bde28 vmlinux-imx_v6_v7 #orig
> > 7419170 318364 379556 8117090 7bdb62 vmlinux-imx_v6_v7 #builtin-bswap
> >
> > Signed-off-by: Kim Phillips <kim.phillips@...escale.com>
> > Reviewed-by: Nicolas Pitre <nico@...aro.org>
> > Acked-by: David Woodhouse <David.Woodhouse@...el.com>
>
> Did this ever go somewhere?
>
> Russell suggested at the time to base it against a mainline kernel
> (since it was patching files which apparently were already patched with
> out-of-tree lz4 patches) and send it to his patch system.
I'll re-base and send it to his patch system.
Thanks,
Kim
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