From: matthieu castet <castet.matthieu@free.fr>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Matthieu CASTET <matthieu.castet@parrot.com>,
Stephen Boyd <sboyd@codeaurora.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
"alan@lxorguk.ukuu.org.uk" <alan@lxorguk.ukuu.org.uk>
Subject: Re: [PATCH v2] hvc_dcc : add support to armv4 and armv5 core
Date: Tue, 25 Sep 2012 19:37:44 +0200 [thread overview]
Message-ID: <20120925193744.655059d5@mat-laptop> (raw)
In-Reply-To: <201209251544.57998.arnd@arndb.de>
Le Tue, 25 Sep 2012 15:44:57 +0000,
Arnd Bergmann <arnd@arndb.de> a écrit :
>
> It's not possible to build a kernel that runs on ARMv5 (or below) and
> also on ARMv6 (or above), so the effect would be exactly the same.
> While we are putting a lot of effort into making all sorts of ARMv6
> and ARMv7 based systems work with the same kernel binary, it's highly
> unlikely we would ever need the above to be runtime selected, because
> there are a lot of other differences at assembly level.
>
I know but Alan was not happy with the static version with ifdef [1]
[2]. That why a dynamic version was done.
Matthieu
[1]
> > There are no plans to ever make it possible; there are too many
> > significant differences between ARMv4, v5 architectures and
> > ARMv6,v7 architectures to warrant making this runtime selectable.
>
> Then bury this crap in platform files please not in the drivers/tty
> layer code. Make it a platform driver provided callback or something.
>
> Alan
[2]
> > I posted a new v2 patch that make the selection dynamic.
>
> Thanks - fine with that one - or with burying it in headers etc in
> the arm subdirs.
next prev parent reply other threads:[~2012-09-25 17:38 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-31 11:47 [PATCH v2] hvc_dcc : add support to armv4 and armv5 core Matthieu CASTET
2012-08-31 16:48 ` Stephen Boyd
2012-09-03 12:57 ` Arnd Bergmann
2012-09-25 15:35 ` Matthieu CASTET
2012-09-25 15:44 ` Arnd Bergmann
2012-09-25 17:37 ` matthieu castet [this message]
2012-09-25 15:40 ` Matthieu CASTET
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