Messages in this thread | | | Subject | Re: Cache incoherencies [example code] | Date | Mon, 30 Aug 1999 14:43:31 +0100 | From | Philip Blundell <> |
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>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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