tree 76e914c5097cb80cf65bf9ce1e48acff8e46795c
parent c68f24cc354050415c5ea543cd19ea5424463a2f
author Eric Dumazet <eric.dumazet@gmail.com> 1276495162 +0000
committer David S. Miller <davem@davemloft.net> 1276582387 -0700

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>