remove set_wmb

set_wmb(var, value) is not used anywhere in the kernel. And it doesn't do anything special but shorten the typing of:

  var = value;
  wmb();

Which the above is much more readable, and thus set_wmb is just something to confuse developers even more.

So this patch series removes set_wmb from the kernel. It's not currently used in the kernel, and any out-of-kernel branch can easily replace it. So there should be no harm in removing it.

The first patch removes it from Documentation/memory-barriers.txt and the second patch does a sweep through all the architectures to get rid of it. All archs do the above code except ia64 and sparc which do a mb() instead. But regardless, it's still not used.

-- Steve