linux-kernel - Re: [PATCH 2/5] Use mutex instead of semaphore in the OnStream SCSI Tape driver

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Message-ID: <alpine.LFD.0.999.0707300853390.10861@enigma.security.iitk.ac.in>
Date:	Mon, 30 Jul 2007 08:57:15 +0530 (IST)
From:	Satyam Sharma <satyam@...radead.org>
To:	Matthias Kaehlcke <matthias.kaehlcke@...il.com>
cc:	osst@...de.org, osst-users@...ts.sourceforge.net,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org
Subject: Re: [PATCH 2/5] Use mutex instead of semaphore in the OnStream SCSI
 Tape driver

Hi,


On Sun, 29 Jul 2007, Matthias Kaehlcke wrote:

> The OnStream SCSI Tape driver uses a semaphore as mutex. Use the mutex
> API instead of the (binary) semaphore.
> 
> Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@...il.com>
> [...]
> @@ -3298,7 +3298,7 @@ static ssize_t osst_write(struct file * filp, const char __user * buf, size_t co
>  	char		    * name = tape_name(STp);
>  
>  
> -	if (down_interruptible(&STp->lock))
> +	if (mutex_lock_interruptible(&STp->lock))
>  		return (-ERESTARTSYS);

The () after return existed in the code already, but you could've felt
free to remove them :-)

> @@ -3619,7 +3619,7 @@ static ssize_t osst_read(struct file * filp, char __user * buf, size_t count, lo
>  	char		    * name  = tape_name(STp);
>  
>  
> -	if (down_interruptible(&STp->lock))
> +	if (mutex_lock_interruptible(&STp->lock))
>  		return (-ERESTARTSYS);

Same here.

Reviewed-by: Satyam Sharma <satyam@...radead.org>
-
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