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udp: relax atomic operation on sk->sk_rmem_alloc
atomic_add_return() is more expensive than atomic_add() and seems overkill in UDP rx fast path. Signed-off-by: Eric Dumazet <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Jakub Kicinski <[email protected]>
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