K 10
svn:author
V 6
andrew
K 8
svn:date
V 27
2015-09-07T14:01:18.236434Z
K 7
svn:log
V 358
Use load-acquire semantics while waiting for td_lock to be released. The
store should have release semantics and will have due to the dsb above it
so add a comment to explain this. [1]

While here update the code to not reload the current thread, it's already
in a register, we just need to not trash it.

Suggested by:	kib [1]
Sponsored by:	ABT Systems Ltd

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