diff options
| author |   John Fastabend <john.fastabend@gmail.com> | 2014-09-12 20:04:52 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-09-13 12:30:25 -0400 |
| commit | 46e5da40aec256155cfedee96dd21a75da941f2c (patch) | |
| tree | cc3986c52025d252c2a063053692595e60c80e13 /net/sched/sch_generic.c | |
| parent | sunvnet: Avoid sending superfluous LDC messages. (diff) | |
| download | linux-dev-46e5da40aec256155cfedee96dd21a75da941f2c.tar.xz linux-dev-46e5da40aec256155cfedee96dd21a75da941f2c.zip | |
net: qdisc: use rcu prefix and silence sparse warnings
Add __rcu notation to qdisc handling by doing this we can make
smatch output more legible. And anyways some of the cases should
be using rcu_dereference() see qdisc_all_tx_empty(),
qdisc_tx_chainging(), and so on.
Also *wake_queue() API is commonly called from driver timer routines
without rcu lock or rtnl lock. So I added rcu_read_lock() blocks
around netif_wake_subqueue and netif_tx_wake_queue.
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/sch_generic.c')
| -rw-r--r-- | net/sched/sch_generic.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c index 19696ebe9ebc..346ef85617d3 100644 --- a/net/sched/sch_generic.c +++ b/net/sched/sch_generic.c @@ -783,7 +783,7 @@ static void dev_deactivate_queue(struct net_device *dev, struct Qdisc *qdisc_default = _qdisc_default; struct Qdisc *qdisc; - qdisc = dev_queue->qdisc; + qdisc = rtnl_dereference(dev_queue->qdisc); if (qdisc) { spin_lock_bh(qdisc_lock(qdisc)); @@ -876,7 +876,7 @@ static void dev_init_scheduler_queue(struct net_device *dev, { struct Qdisc *qdisc = _qdisc; - dev_queue->qdisc = qdisc; + rcu_assign_pointer(dev_queue->qdisc, qdisc); dev_queue->qdisc_sleeping = qdisc; } |