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Re: [MIPS] Enable support for the userlocal hardware register

To: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Subject: Re: [MIPS] Enable support for the userlocal hardware register
From: Ralf Baechle <ralf@linux-mips.org>
Date: Fri, 13 Jul 2007 18:59:15 +0100
Cc: linux-mips@linux-mips.org
In-reply-to: <20070713.003727.08076834.anemo@mba.ocn.ne.jp>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <S20023433AbXGIOIU/20070709140820Z+13176@ftp.linux-mips.org> <20070713.003727.08076834.anemo@mba.ocn.ne.jp>
Sender: linux-mips-bounce@linux-mips.org
User-agent: Mutt/1.5.14 (2007-02-12)
On Fri, Jul 13, 2007 at 12:37:27AM +0900, Atsushi Nemoto wrote:

> On Mon, 09 Jul 2007 15:08:15 +0100, linux-mips@linux-mips.org wrote:
> > Which will cut down the cost of RDHWR $29 which is used to obtain the
> > TLS pointer and so far being emulated in software down to a single cycle
> > operation.
> 
> Since cpu_has_userlocal is used in a critical path (switch_to),
> overriding in each cpu-feature-overrides.h might be expected.

Every sper^Wcycle is holy, as Monthy Python would say.

  Ralf

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