flush_dcache_page does too much?

[Russell King - ARM Linux]

On Mon, Jan 18, 2010 at 09:54:31PM +0800, anfei wrote:
> Do you mean this implementation can ensure the coherence between write
> and shared mmapings?  But it's easy to reproduce the alias problem by
> this simple testcase (w/o error handler) on omap2430 with VIPT cache:

Your program doesn't do anything to identify any problem.  You don't
even say _what_ problem you see with this program.

If you have a specific case which fails, please show the problem, please
describe exactly the behaviour that you see, and what you expect to see.