Eric Dumazet
6b10de38f0
loopback: Implement 64bit stats on 32bit arches ...
Uses a seqcount_t to synchronize stat producer and consumer, for packets
and bytes counter, now u64 types.
(dropped counter being rarely used, stay a native "unsigned long" type)
No noticeable performance impact on x86, as it only adds two increments
per frame. It might be more expensive on arches where smp_wmb() is not
free.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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6b10de38f0