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Re: [PATCH] IP28: added cache barrier to assembly routines

To: tsbogend@alpha.franken.de
Subject: Re: [PATCH] IP28: added cache barrier to assembly routines
From: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Date: Wed, 28 Nov 2007 23:41:42 +0900 (JST)
Cc: linux-mips@linux-mips.org, ralf@linux-mips.org
In-reply-to: <20071126223955.9BAAAC2B26@solo.franken.de>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <20071126223955.9BAAAC2B26@solo.franken.de>
Sender: linux-mips-bounce@linux-mips.org
On Sun, 25 Nov 2007 11:47:56 +0100, Thomas Bogendoerfer 
<tsbogend@alpha.franken.de> wrote:
> IP28 needs special treatment to avoid speculative accesses. gcc
> takes care for .c code, but for assembly code we need to do it
> manually.
> 
> This is taken from Peter Fuersts IP28 patches.
> 
> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
> ---
>  arch/mips/lib/memcpy.S       |   10 ++++++++++
>  arch/mips/lib/memset.S       |    5 +++++
>  arch/mips/lib/strncpy_user.S |    1 +
>  include/asm-mips/asm.h       |    8 ++++++++
>  4 files changed, 24 insertions(+), 0 deletions(-)

I do not know details of this patch at all, but in general,
memcpy-inatomic.S and csum_pertial.S are candidates if you changed
memcpy.S.

---
Atsushi Nemoto

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