linux-kernel - Re: kmap_atomic_pfn for PCI BAR access?

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Message-ID: <20080626033430.5b8b711d@infradead.org>
Date:	Thu, 26 Jun 2008 03:34:30 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Keith Packard <keithp@...thp.com>
Cc:	keithp@...thp.com, Dave Airlie <airlied@...il.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Dave Airlie <airlied@...ux.ie>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: kmap_atomic_pfn for PCI BAR access?

On Wed, 25 Jun 2008 22:36:29 -0700
Keith Packard <keithp@...thp.com> wrote:

> On Wed, 2008-06-25 at 21:36 -0700, Arjan van de Ven wrote:
> 
> > well kmap does a tlb flush as well... 
> 
> kmap_atomic

that needs to, and does, a flush as well.
granted, a per cpu flush, but it's a flush neverthelesss

> 


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