Yes.  Cache bits are in the page tables, and it would be idiotic to
manipulate the cache bits on a 1MB granularity over the kernel
direct mapped space.
> furthermore i don't see why this could not be interrupt safe.
GFP_KERNEL in the page table allocation functions mainly.  We've been
around and around this recently on this mailing list, so I'm not going
to say anything further.  I don't want another long discussion about
this subject taking my time away from doing real work on ARM.  If you're
really interested in the outcome, please examine the lkml archives.
-- 
Russell King (rmk@arm.linux.org.uk)                The developer of ARM Linux
             http://www.arm.linux.org.uk/personal/aboutme.html
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