[PATCH v3 1/2] iopoll: Introduce memory-mapped IO polling macros

[Thierry Reding]

On Sat, Sep 27, 2014 at 08:27:28PM -0700, Mitchel Humpherys wrote:
> From: Matt Wagantall <mattw at codeaurora.org>
> 
> It is sometimes necessary to poll a memory-mapped register until its
> value satisfies some condition. Introduce a family of convenience macros
> that do this. Tight-loop and sleeping versions are provided with and
> without timeouts.
> 
> Cc: Thierry Reding <thierry.reding at gmail.com>
> Cc: Will Deacon <will.deacon at arm.com>
> Signed-off-by: Matt Wagantall <mattw at codeaurora.org>
> Signed-off-by: Mitchel Humpherys <mitchelh at codeaurora.org>
> ---
>  include/linux/iopoll.h | 77 ++++++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 77 insertions(+)
>  create mode 100644 include/linux/iopoll.h

It would be good to provide a changelog with each new version of the
patch. As it is I now have v2 and v3 of this patch in my inbox and I
have no idea what the differences are, so I'd need to download both
and run them through interdiff to find out.

Thierry
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