Rafael Espindola 3f210fc0c8 Drop an unnecessary use of writev. ...

It looks like the code this patch deletes is based on a misunderstanding of
what guarantees writev provides. In particular, writev with 1 iovec is
not "more atomic" than a write.

Testing on OS X shows that both write and writev from multiple processes
can be intermixed.

llvm-svn: 255837

2015-12-16 22:59:06 +00:00

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