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authorDavid S. Miller <davem@davemloft.net>2013-03-27 13:52:49 -0400
committerDavid S. Miller <davem@davemloft.net>2013-03-27 13:52:49 -0400
commite2a553dbf18a5177fdebe29495c32a8e7fd3a4db (patch)
tree5ccb3d498325a7aaf93f49549eca03cb7861ca1c /net/sunrpc/sched.c
parent7559d97993ae7d552c96313155286f372cf4cf7c (diff)
parenta8c45289f215e137825bf9630d0abb41c1dc41ff (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts: include/net/ipip.h The changes made to ipip.h in 'net' were already included in 'net-next' before that header was moved to another location. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sunrpc/sched.c')
-rw-r--r--net/sunrpc/sched.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c
index fb20f25ddec9..f8529fc8e542 100644
--- a/net/sunrpc/sched.c
+++ b/net/sunrpc/sched.c
@@ -180,6 +180,8 @@ static void __rpc_add_wait_queue(struct rpc_wait_queue *queue,
list_add_tail(&task->u.tk_wait.list, &queue->tasks[0]);
task->tk_waitqueue = queue;
queue->qlen++;
+ /* barrier matches the read in rpc_wake_up_task_queue_locked() */
+ smp_wmb();
rpc_set_queued(task);
dprintk("RPC: %5u added to queue %p \"%s\"\n",
@@ -430,8 +432,11 @@ static void __rpc_do_wake_up_task(struct rpc_wait_queue *queue, struct rpc_task
*/
static void rpc_wake_up_task_queue_locked(struct rpc_wait_queue *queue, struct rpc_task *task)
{
- if (RPC_IS_QUEUED(task) && task->tk_waitqueue == queue)
- __rpc_do_wake_up_task(queue, task);
+ if (RPC_IS_QUEUED(task)) {
+ smp_rmb();
+ if (task->tk_waitqueue == queue)
+ __rpc_do_wake_up_task(queue, task);
+ }
}
/*