Dear Dirk Behme,
In message <4d2b3036.4010...@googlemail.com> you wrote:
>
> The question I was thinking about with my patch was "what's Right
> Thing?" ;)
The Right Thing i not to make specific assumptions how the compiler
might handle volatile pointers.
> It's my understanding that we don't fix read*() and write*() because
> they are broken. We touch them to work around a broken tool chain.
No. Please re-read volatile-considered-harmful.txt in the
linux/Documentation directory: "accessing I/O memory directly through
pointers is frowned upon and does not work on all architectures.
Those accessors are written to prevent unwanted optimization".
Best regards,
Wolfgang Denk
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