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

On Sat, Sep 27, 2014 at 08:27:28PM -0700, Mitchel Humpherys wrote:

From: Matt Wagantall <redacted>

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 <redacted>
Cc: Will Deacon <redacted>
Signed-off-by: Matt Wagantall <redacted>
Signed-off-by: Mitchel Humpherys <redacted>
---
 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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