6093567 Auto-sync with upstream branch master

Authored and Committed by codonell 2 years ago
    Auto-sync with upstream branch master
    
    Upstream commit: ade8b817fead73b302d08c88cd44ea2ea56793d4
    
    - powerpc: missing CFI register information in __mpn_* functions (swbz#23614)
    - rdlock stalls indefinitely on an unlocked pthread rwlock (swbz#23861)
    
        
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