linux-kernel - Re: [PATCH RT 2/5] a few open coded completions

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Date:	Sun, 09 Mar 2014 00:27:21 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Steven Rostedt <rostedt@...dmis.org>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:	linux-kernel@...r.kernel.org,
	linux-rt-users <linux-rt-users@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Carsten Emde <C.Emde@...dl.org>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	John Kacur <jkacur@...hat.com>,
	Corey Minyard <cminyard@...sta.com>
Subject: Re: [PATCH RT 2/5] a few open coded completions

On Wed, 2013-12-11 at 14:49 -0500, Steven Rostedt wrote:
> Here's the new patch:

Doesn't add #includes and doesn't change any types, so of course it
doesn't compile.  WTF?

Ben.

> From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
> Date: Mon, 28 Oct 2013 11:50:06 +0100
> Subject: [PATCH] swait: Add a few more users
> 
> The wait-simple queue is lighter weight and more efficient than the full
> wait queue, and may be used in atomic context on PREEMPT_RT.
> 
> Fix up some places that needed to call the swait_*() functions instead
> of the wait_*() functions.
> 
> Cc: stable-rt@...r.kernel.org
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
> Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
> ---
>  drivers/net/wireless/orinoco/orinoco_usb.c | 2 +-
>  drivers/usb/gadget/f_fs.c                  | 2 +-
>  drivers/usb/gadget/inode.c                 | 4 ++--
>  3 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/wireless/orinoco/orinoco_usb.c b/drivers/net/wireless/orinoco/orinoco_usb.c
> index 1f9cb55..a28f298 100644
> --- a/drivers/net/wireless/orinoco/orinoco_usb.c
> +++ b/drivers/net/wireless/orinoco/orinoco_usb.c
> @@ -714,7 +714,7 @@ static void ezusb_req_ctx_wait(struct ezusb_priv *upriv,
>  			while (!ctx->done.done && msecs--)
>  				udelay(1000);
>  		} else {
> -			wait_event_interruptible(ctx->done.wait,
> +			swait_event_interruptible(ctx->done.wait,
>  						 ctx->done.done);
>  		}
>  		break;
> diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c
> index b6e9d91..35d9c53 100644
> --- a/drivers/usb/gadget/f_fs.c
> +++ b/drivers/usb/gadget/f_fs.c
> @@ -1282,7 +1282,7 @@ static void ffs_data_put(struct ffs_data *ffs)
>  		pr_info("%s(): freeing\n", __func__);
>  		ffs_data_clear(ffs);
>  		BUG_ON(waitqueue_active(&ffs->ev.waitq) ||
> -		       waitqueue_active(&ffs->ep0req_completion.wait));
> +		       swaitqueue_active(&ffs->ep0req_completion.wait));
>  		kfree(ffs->dev_name);
>  		kfree(ffs);
>  	}
> diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c
> index 570c005..c60233d 100644
> --- a/drivers/usb/gadget/inode.c
> +++ b/drivers/usb/gadget/inode.c
> @@ -340,7 +340,7 @@ ep_io (struct ep_data *epdata, void *buf, unsigned len)
>  	spin_unlock_irq (&epdata->dev->lock);
>  
>  	if (likely (value == 0)) {
> -		value = wait_event_interruptible (done.wait, done.done);
> +		value = swait_event_interruptible (done.wait, done.done);
>  		if (value != 0) {
>  			spin_lock_irq (&epdata->dev->lock);
>  			if (likely (epdata->ep != NULL)) {
> @@ -349,7 +349,7 @@ ep_io (struct ep_data *epdata, void *buf, unsigned len)
>  				usb_ep_dequeue (epdata->ep, epdata->req);
>  				spin_unlock_irq (&epdata->dev->lock);
>  
> -				wait_event (done.wait, done.done);
> +				swait_event (done.wait, done.done);
>  				if (epdata->status == -ECONNRESET)
>  					epdata->status = -EINTR;
>  			} else {

-- 
Ben Hutchings
I say we take off; nuke the site from orbit.  It's the only way to be sure.

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