[GHC] #14244: ghc-prim: hs_atomicread* and hs_atomicwrite* missing barriers

[GHC]

#14244: ghc-prim: hs_atomicread* and hs_atomicwrite* missing barriers
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        Reporter:  trommler          |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  highest           |            Milestone:  8.4.1
       Component:  Prelude           |              Version:  8.2.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect result  |  Unknown/Multiple
  at runtime                         |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #12537            |  Differential Rev(s):  Phab:D4009
       Wiki Page:                    |
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Changes (by bgamari):

 * owner:  trommler => (none)
 * priority:  high => highest
 * status:  closed => new
 * resolution:  fixed =>


Comment:

 Reopening to ensure I don't forget to fix this.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14244#comment:9>
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