Re: Cache incoherencies [example code]
Philip Blundell (Philip.Blundell@pobox.com)
Mon, 30 Aug 1999 14:43:31 +0100
>What happens if I simply try to create an additional mapping for an
>existing page ? Basically, what happens if I use ioremap on the physical
>location of a kmalloc'ed page ?
>
>Of course, I will end up having two virtual mappings to the same page,
>but if I make sure to only actually use the uncachable one, will there be
>a problem ? Would something prevent ioremap from creating a mapping for a
>physical page in the SDRAM range ?
Depends on the architecture. On ARM you will be fine so long as you use
__ioremap directly rather than ioremap itself.
p.
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