4f096d 249.4-2.12: backport PR#20695 and FB-only MemoryZSwapMax=

Authored and Committed by anitazha 2 years ago
    249.4-2.12: backport PR#20695 and FB-only MemoryZSwapMax=
    
    - Backport PR #20695: Sync if_arp.h with Linux 5.14
    - FB-only backport PR #22426: MemoryZSwapMax= to configure memory.zswap.max
    
        
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