Re: pgprot_writecombine & shub 1.x

From: Jesse Barnes <jbarnes_at_sgi.com>
Date: 2005-01-12 09:35:36
On Tuesday, January 11, 2005 2:12 pm, David Mosberger wrote:
> This seems wrong to me.  pgprot_writecombine() should do what it says,
> no more and no less.
>
> The EFI memory-map has already all the info needed to determine
> whether write-combine mapping is supported, so perhaps the code should
> be changed to take that into consideration instead?

But what about places that unconditionally set the WC bit regardless of what 
the EFI memory map says?  pci_mmap_page_range does this for example if the 
write_combine flag is set on the vma.  I'm looking for a way to abstract out 
uses like that, so that shub 1.x systems don't set the bit.

Jesse
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Received on Tue Jan 11 17:42:03 2005

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