[GHC] #8289: unused variable in rts/posix/OSMem.c getPageSize

[GHC]

#8289: unused variable in rts/posix/OSMem.c getPageSize
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       Reporter:  rwbarton          |             Owner:
           Type:  bug               |            Status:  new
       Priority:  low               |         Milestone:
      Component:  Compiler          |           Version:  7.7
       Keywords:                    |  Operating System:  Unknown/Multiple
   Architecture:  Unknown/Multiple  |   Type of failure:  None/Unknown
     Difficulty:  Unknown           |         Test Case:
     Blocked By:                    |          Blocking:
Related Tickets:                    |
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 bgamari pointed this out on IRC.

 The static variable `pageSize` is never set, so every `getPageSize` call
 does a system call.  There should be a line `pageSize = ret;` before
 `return ret;`.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8289>
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