Messages in this thread | | | Date | Wed, 18 May 2016 21:57:59 +0100 | From | Russell King - ARM Linux <> | Subject | Re: [RFC PATCH 1/3] asm-generic: io: Add exec versions of ioremap |
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On Wed, May 18, 2016 at 10:25:03PM +0200, Arnd Bergmann wrote: > The ARM version of ioremap_exec() that gets added in this patch is cached > (like memremap()), but then the asm-generic version is not? This is > even more confusing, it should at least do roughly the same thing across > architectures. > > There should also be some documentation about what the expected behavior is, e.g.: > > - is memremap_exec() by default cached or not? (I assume it would > be like memremap()) > - If we have an interface that does explicit uncached executable mapping, > what about architectures on which this is not possible? Should they > fall back to cached or non-executable, or cause a link error?
Another important point is whether atomic instructions / kernel locks can be located within the mapped memory.
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