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These are unexploded minds as far as the linter is concerned. I don't
want to hit in my MRs by mistake!
I did this with `sed`, and then rolled back some changes in the docs,
config.guess, and the linter itself.
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In the work stealing queue a load-load-barrier is required to ensure
that a read of queue data cannot be reordered before a read of the
bottom pointer into the queue.
The added load-load-barrier ensures that the ordering of writes enforced
at the end of `pushWSDeque` is also respected in the order of reads in
`stealWSDeque_`. In other words, when reading `q->bottom` we want to make
sure that we see the updates to `q->elements`.
Fixes #13633
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The `nat` type was an alias for `unsigned int` with a comment saying
it was at least 32 bits. We keep the typedef in case client code is
using it but mark it as deprecated.
Test Plan: Validated on Linux, OS X and Windows
Reviewers: simonmar, austin, thomie, hvr, bgamari, hsyl20
Differential Revision: https://phabricator.haskell.org/D2166
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This helps identify threads in gdb particularly in processes with a
lot of threads.
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