workqueue: add to_delayed_work() helper function

It is a fairly common operation to have a pointer to a work and to need a
pointer to the delayed work it is contained in.  In particular, all
delayed works which want to rearm themselves will have to do that.  So it
would seem fair to offer a helper function for this operation.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Greg KH <greg@kroah.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/net/mlx4/sense.c b/drivers/net/mlx4/sense.c
index 6d5089ecb5af..f36ae691cab3 100644
--- a/drivers/net/mlx4/sense.c
+++ b/drivers/net/mlx4/sense.c
@@ -103,7 +103,7 @@ void mlx4_do_sense_ports(struct mlx4_dev *dev,
 
 static void mlx4_sense_port(struct work_struct *work)
 {
-        struct delayed_work *delay = container_of(work, struct delayed_work, work);
+        struct delayed_work *delay = to_delayed_work(work);
         struct mlx4_sense *sense = container_of(delay, struct mlx4_sense,
                                                 sense_poll);
         struct mlx4_dev *dev = sense->dev;