linux-kernel - Re: [PATCH] usb otg: use atomic notifier instead of blocking notifier

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Message-ID: <20110119103323.GC4693@hedu-HP-Z800-Workstation>
Date:	Wed, 19 Jan 2011 12:33:23 +0200
From:	Heikki Krogerus <heikki.krogerus@...ia.com>
To:	Grazvydas Ignotas <notasas@...il.com>
Cc:	Greg Kroah-Hartman <gregkh@...e.de>,
	Mian Yousaf Kaukab <mian.yousaf.kaukab@...ricsson.com>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	Felipe Balbi <balbi@...com>, Tejun Heo <tj@...nel.org>,
	Samuel Ortiz <sameo@...ux.intel.com>, Hema HK <hemahk@...com>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	Yang Ruirui <ruirui.r.yang@...to.com>,
	David Brownell <david-b@...bell.net>
Subject: Re: [PATCH] usb otg: use atomic notifier instead of blocking
 notifier

On Wed, Jan 19, 2011 at 05:20:11PM +0800, ext Yang Ruirui wrote:
> --- linux-2.6.orig/include/linux/usb/otg.h      2011-01-17 09:39:11.000000000 +0800
> +++ linux-2.6/include/linux/usb/otg.h   2011-01-19 16:38:06.649546989 +0800
> @@ -74,7 +74,7 @@ struct otg_transceiver {
>         void __iomem                    *io_priv;
> 
>         /* for notification of usb_xceiv_events */
> -       struct blocking_notifier_head   notifier;
> +       struct atomic_notifier_head     notifier;
> 
>         /* to pass extra port status to the root hub */
>         u16                     port_status;
> @@ -234,13 +234,13 @@ otg_start_srp(struct otg_transceiver *ot
>  static inline int
>  otg_register_notifier(struct otg_transceiver *otg, struct notifier_block *nb)
>  {
> -       return blocking_notifier_chain_register(&otg->notifier, nb);
> +       return atomic_notifier_chain_register(&otg->notifier, nb);
>  }
> 
>  static inline void
>  otg_unregister_notifier(struct otg_transceiver *otg, struct notifier_block *nb)
>  {
> -       blocking_notifier_chain_unregister(&otg->notifier, nb);
> +       atomic_notifier_chain_unregister(&otg->notifier, nb);
>  }
> 
>  /* for OTG controller drivers (and maybe other stuff) */

Is drivers/power/twl4030_charger.c ready for atomic notifiers?

-- 
heikki
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