[PATCH 2/2] arm64: set MAX_MEMBLOCK_ADDR according to linear region size
catalin.marinas at arm.com
Tue Aug 18 09:16:49 PDT 2015
On Tue, Aug 18, 2015 at 03:51:49PM +0100, Russell King - ARM Linux wrote:
> On Tue, Aug 18, 2015 at 03:24:36PM +0100, Catalin Marinas wrote:
> > With the current memory layout, this could also be __pa(~0UL). I guess
> > we could solve this with a single patch, though I'm not sure whether we
> > break other architectures:
> No. __pa() is only valid within the lowmem mapping, not outside of it.
> What you'd get for a virtual address of ~0UL is not well defined, so
> you should not use this in generic code.
You are right. We'll keep this max memblock address in the arch code.
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