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Re: pte_pagenr/MAP_NR deleted in pre6
- To: kanoj@google.engr.sgi.com (Kanoj Sarcar)
- Subject: Re: pte_pagenr/MAP_NR deleted in pre6
- From: Alan Cox <alan@lxorguk.ukuu.org.uk>
- Date: Thu, 17 Aug 2000 20:56:05 +0100 (BST)
- Cc: davem@redhat.com (David S. Miller), alan@lxorguk.ukuu.org.uk, sct@redhat.com, roman@augan.com, linux-mm@kvack.org, linux-kernel@vger.rutgers.edu, rmk@arm.linux.org.uk, nico@cam.org, davidm@hpl.hp.com
- In-Reply-To: <200008171950.MAA45378@google.engr.sgi.com> from "Kanoj Sarcar" at Aug 17, 2000 12:50:40 PM
- Sender: owner-linux-mm@kvack.org
> So, unlike system vendors adding in dma mapping registers for PCI32
> devices to dma anywhere into their >32 bit physical address space, you
> are assuming no vendor will ever have a mapping scheme for ISA devices
> that let them get over the 16MB mark?
They did. Even on a few x86 boards. Supporting those bits of weirdness are
not important. If the ISA 16Mb window is offset someone can wrap it in their
arch specific isa_alloc_consistent code..
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