[RFC PATCH v4] ARM: uprobes xol write directly to userspace

[Russell King - ARM Linux]

On Wed, Apr 16, 2014 at 09:18:25PM +0200, Oleg Nesterov wrote:
> Looks like, __kunmap_atomic()->__cpuc_flush_dcache_area() should take
> care, but could you please ack/nack my understanding?

flush_dcache_area() doesn't touch the I-cache... the hint is in the
name. :)  This is also the function which is used for flush_dcache_page()
which we've already established isn't sufficient (for the same reason.)

Plus... we still would need to know the user address(es) to flush for
the I-cache side...

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