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(parent: c68f24c) | patch
loopback: Implement 64bit stats on 32bit arches
authorEric Dumazet <eric.dumazet@gmail.com>
Mon, 14 Jun 2010 05:59:22 +0000 (05:59 +0000)
committerDavid S. Miller <davem@davemloft.net>
Tue, 15 Jun 2010 06:13:07 +0000 (23:13 -0700)
commit6b10de38f0ef4e921a1f6e5cba2b6c92d6b46ecd
tree76e914c5097cb80cf65bf9ce1e48acff8e46795ctree | snapshot (tar.gz zip)
parentc68f24cc354050415c5ea543cd19ea5424463a2fcommit | diff
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>
drivers/net/loopback.c diff | blob | blame | history
kernel source for telekom puls (alcatel/mediatek)