netdev - Re: [PATCH 3/20][BNX2]: Add 40-bit DMA workaround for 5708.

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Date:	Wed, 02 May 2007 12:40:00 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	mchan@...adcom.com
Cc:	jeff@...zik.org, netdev@...r.kernel.org
Subject: Re: [PATCH 3/20][BNX2]: Add 40-bit DMA workaround for 5708.

From: "Michael Chan" <mchan@...adcom.com>
Date: Wed, 2 May 2007 08:23:40 -0700

> A non-IOMMU system using 64-bit dma_addr_t will always set
> CONFIG_HIGHMEM, right?

Nope, IA-64 is at least one example.

IA-64 has both IOMMU and non-IOMMU configurations, and
never sets HIGHMEM.
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