linux-kernel - Re: [patch 01/10] smbfs: Convert server->sem to mutex

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Date:	Fri, 29 Jan 2010 17:14:53 -0500
From:	Christoph Hellwig <hch@...radead.org>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Christoph Hellwig <hch@...radead.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...e.hu>, Al Viro <viro@...iv.linux.org.uk>,
	Jeff Layton <jlayton@...hat.com>,
	Steve French <sfrench@...ibm.com>
Subject: Re: [patch 01/10] smbfs: Convert server->sem to mutex

On Fri, Jan 29, 2010 at 08:38:34PM -0000, Thomas Gleixner wrote:
> The semaphore server->sem is used as mutex. Rename it to server->mutex
> and convert it to a real mutex.
> 
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
> Cc: Al Viro <viro@...iv.linux.org.uk>
> Cc: Jeff Layton <jlayton@...hat.com>
> Cc: Steve French <sfrench@...ibm.com>

Looks good,


Reviewed-by: Christoph Hellwig <hch@....de>

>  static inline int
>  smb_lock_server_interruptible(struct smb_sb_info *server)
>  {
> -	return down_interruptible(&(server->sem));
> +	return mutex_lock_interruptible(&server->mutex);
>  }
>  
>  static inline void
>  smb_lock_server(struct smb_sb_info *server)
>  {
> -	down(&(server->sem));
> +	mutex_lock(&server->mutex);
>  }
>  
>  static inline void
>  smb_unlock_server(struct smb_sb_info *server)
>  {
> -	up(&(server->sem));
> +	mutex_unlock(&server->mutex);
>  }

Eventually someone should also kill this useless wrappers, but let's do
one thing at a time for now.

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