[GHC] #8621: Pull request for inclusion in `unix' module of fsync(2), fdatasync(2), posix_fadvise(2) and posix_fallocate(2)

[GHC]

#8621: Pull request for inclusion in `unix' module of fsync(2), fdatasync(2),
posix_fadvise(2) and posix_fallocate(2)
-------------------------------------+-------------------------------------
              Reporter:              |            Owner:
  jimenezrick                        |           Status:  upstream
                  Type:  task        |        Milestone:  7.10.1
              Priority:  normal      |          Version:  7.6.3
             Component:              |         Keywords:
  libraries/unix                     |     Architecture:  Unknown/Multiple
            Resolution:              |       Difficulty:  Easy (less than 1
      Operating System:  POSIX       |  hour)
       Type of failure:              |       Blocked By:
  None/Unknown                       |  Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
-------------------------------------+-------------------------------------

Comment (by hvr):

 I've created a PR out that at https://github.com/haskell/unix/pull/7 so it
 doesn't get lost

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8621#comment:6>
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