Re: [PATCH] Add to_delayed_work helper function

[Ingo Molnar <mingo@elte.hu>]

* Jean Delvare <khali@linux-fr.org> wrote:

> 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.
> 
> Signed-off-by: Jean Delvare <khali@linux-fr.org>
> ---
> Andrew, does this variant please you better?
> 
>  arch/powerpc/kernel/vio.c                               |    2 +-
>  drivers/crypto/hifn_795x.c                              |    2 +-
>  drivers/input/mouse/hgpk.c                              |    2 +-
>  drivers/net/dm9000.c                                    |    2 +-
>  drivers/net/mlx4/en_netdev.c                            |    2 +-
>  drivers/net/mlx4/en_rx.c                                |    2 +-
>  drivers/s390/scsi/zfcp_fc.c                             |    2 +-
>  drivers/staging/rtl8187se/ieee80211/ieee80211_softmac.c |    8 ++++----
>  drivers/staging/rtl8187se/r8180_core.c                  |    8 ++++----
>  drivers/staging/rtl8187se/r8180_dm.c                    |    6 +++---
>  drivers/usb/wusbcore/devconnect.c                       |    2 +-
>  include/linux/workqueue.h                               |    5 +++++
>  mm/slab.c                                               |    3 +--
>  13 files changed, 25 insertions(+), 21 deletions(-)

looks good,

Acked-by: Ingo Molnar <mingo@elte.hu>

one small detail:

> --- linux-2.6.29-rc6.orig/include/linux/workqueue.h	2009-01-29 08:27:20.000000000 +0100
> +++ linux-2.6.29-rc6/include/linux/workqueue.h	2009-03-03 10:36:53.000000000 +0100
> @@ -41,6 +41,11 @@ struct delayed_work {
>  	struct timer_list timer;
>  };
>  
> +static inline struct delayed_work *to_delayed_work(struct work_struct *_work)
> +{
> +	return container_of(_work, struct delayed_work, work);
> +}
> +

there's no need to name it _work i think and '*work' should be 
just fine - this isnt a macro so there's no danger of namespace 
interactions.

	Ingo