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Re: cacheflush system call-MIPS

To: peter fuerst <post@pfrst.de>
Subject: Re: cacheflush system call-MIPS
From: Ralf Baechle <ralf@linux-mips.org>
Date: Fri, 13 Feb 2009 23:56:03 +0000
Cc: naresh kamboju <naresh.kernel@gmail.com>, linux-mips@linux-mips.org
In-reply-to: <Pine.LNX.4.58.0902140002180.408@Indigo2.Peter>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <f5a7b3810902100716t2658ce95t2dcc7f85634522@mail.gmail.com> <20090211131649.GA1365@linux-mips.org> <Pine.LNX.4.58.0902140002180.408@Indigo2.Peter>
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On Sat, Feb 14, 2009 at 12:50:46AM +0100, peter fuerst wrote:

> there is one more good reason to ... : the Impact Xserver needs to do
> a cacheflush(a,w,DCACHE) as part of the refresh-sequence.
> And hence requires a sys_cacheflush, let's say, more conforming to the
> man-page (or some disgusting new ioctl in the Impact kernel-driver to
> do an equivalent operation ;-)

Why does it need that flush?

  Ralf

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