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    Ensure that we don't produce code for pre-ARMv7 without barriers · 9fe7d20e
    Ben Gamari authored and Ben Gamari's avatar Ben Gamari committed
    We are unable to produce load/store barriers for pre-ARMv7 targets.
    Phab:D894 added dummy cases to SMP.h for these barriers to prevent the
    build from failing under the assumption that there are no SMP-capable
    devices of this vintage. However, #10433 points out that it is more
    correct to simply set NOSMP for such targets.
    
    Tested By: rwbarton
    
    Test Plan: Validate
    
    Reviewers: erikd, rwbarton, austin
    
    Reviewed By: rwbarton
    
    Subscribers: thomie
    
    Differential Revision: https://phabricator.haskell.org/D1704
    
    GHC Trac Issues: #10433
    9fe7d20e