diff options
| author | John Stultz <john.stultz@linaro.org> | 2013-10-08 00:51:58 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-11-06 12:40:25 +0100 |
| commit | 827da44c61419f29ae3be198c342e2147f1a10cb (patch) | |
| tree | 54cff222bd9ec230df4c92908d41efba7cc9c928 /drivers/net/ifb.c | |
| parent | locking: Move the percpu-rwsem code to kernel/locking/ (diff) | |
| download | linux-827da44c61419f29ae3be198c342e2147f1a10cb.tar.xz linux-827da44c61419f29ae3be198c342e2147f1a10cb.zip | |
net: Explicitly initialize u64_stats_sync structures for lockdep
In order to enable lockdep on seqcount/seqlock structures, we
must explicitly initialize any locks.
The u64_stats_sync structure, uses a seqcount, and thus we need
to introduce a u64_stats_init() function and use it to initialize
the structure.
This unfortunately adds a lot of fairly trivial initialization code
to a number of drivers. But the benefit of ensuring correctness makes
this worth while.
Because these changes are required for lockdep to be enabled, and the
changes are quite trivial, I've not yet split this patch out into 30-some
separate patches, as I figured it would be better to get the various
maintainers thoughts on how to best merge this change along with
the seqcount lockdep enablement.
Feedback would be appreciated!
Signed-off-by: John Stultz <john.stultz@linaro.org>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: James Morris <jmorris@namei.org>
Cc: Jesse Gross <jesse@nicira.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Mirko Lindner <mlindner@marvell.com>
Cc: Patrick McHardy <kaber@trash.net>
Cc: Roger Luethi <rl@hellgate.ch>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Simon Horman <horms@verge.net.au>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Wensong Zhang <wensong@linux-vs.org>
Cc: netdev@vger.kernel.org
Link: http://lkml.kernel.org/r/1381186321-4906-2-git-send-email-john.stultz@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/net/ifb.c')
| -rw-r--r-- | drivers/net/ifb.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/ifb.c b/drivers/net/ifb.c index a3bed28197d2..c14d39bf32d0 100644 --- a/drivers/net/ifb.c +++ b/drivers/net/ifb.c @@ -265,6 +265,7 @@ MODULE_PARM_DESC(numifbs, "Number of ifb devices"); static int __init ifb_init_one(int index) { struct net_device *dev_ifb; + struct ifb_private *dp; int err; dev_ifb = alloc_netdev(sizeof(struct ifb_private), @@ -273,6 +274,10 @@ static int __init ifb_init_one(int index) if (!dev_ifb) return -ENOMEM; + dp = netdev_priv(dev_ifb); + u64_stats_init(&dp->rsync); + u64_stats_init(&dp->tsync); + dev_ifb->rtnl_link_ops = &ifb_link_ops; err = register_netdevice(dev_ifb); if (err < 0) |