Re: [RFC][patch 0/2] mm: remove PageReserved

[Russell King <rmk+lkml@arm.linux.org.uk>]

On Tue, Aug 09, 2005 at 07:38:52AM -0700, Martin J. Bligh wrote:
> pfn_valid() doesn't tell you it's RAM or not - it tells you whether you
> have a backing struct page for that address. Could be an IO mapped device,
> a small memory hole, whatever.

The only things which have a struct page is RAM.  Nothing else does.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 Serial core
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