linux-kernel - Re: [patch 15/30] smbfs: Convert server->sem to mutex

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Message-ID: <20100910084629.239dc62f@corrin.poochiereds.net>
Date:	Fri, 10 Sep 2010 08:46:29 -0400
From:	Jeff Layton <jlayton@...hat.com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peterz@...radead.org>,
	Christoph Hellwig <hch@...radead.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	linux-fsdevel@...r.kernel.org
Subject: Re: [patch 15/30] smbfs: Convert server->sem to mutex

On Tue, 07 Sep 2010 14:32:52 -0000
Thomas Gleixner <tglx@...utronix.de> wrote:

> server->sem is used as mutex so make it a mutex.
> 
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
> Cc: Al Viro <viro@...iv.linux.org.uk>
> Cc: linux-fsdevel@...r.kernel.org
> 
> ---
>  fs/smbfs/inode.c          |    2 +-
>  include/linux/smb_fs_sb.h |    8 ++++----
>  2 files changed, 5 insertions(+), 5 deletions(-)
> 
> Index: linux-2.6/fs/smbfs/inode.c
> ===================================================================
> --- linux-2.6.orig/fs/smbfs/inode.c
> +++ linux-2.6/fs/smbfs/inode.c
> @@ -536,7 +536,7 @@ static int smb_fill_super(struct super_b
>  	server->mnt = NULL;
>  	server->sock_file = NULL;
>  	init_waitqueue_head(&server->conn_wq);
> -	init_MUTEX(&server->sem);
> +	mutex_init(&server->mutex);
>  	INIT_LIST_HEAD(&server->entry);
>  	INIT_LIST_HEAD(&server->xmitq);
>  	INIT_LIST_HEAD(&server->recvq);
> Index: linux-2.6/include/linux/smb_fs_sb.h
> ===================================================================
> --- linux-2.6.orig/include/linux/smb_fs_sb.h
> +++ linux-2.6/include/linux/smb_fs_sb.h
> @@ -58,7 +58,7 @@ struct smb_sb_info {
>  	struct smb_conn_opt opt;
>  	wait_queue_head_t conn_wq;
>  	int conn_complete;
> -	struct semaphore sem;
> +	struct mutex mutex;
>  
>  	unsigned char      header[SMB_HEADER_LEN + 20*2 + 2];
>  	u32                header_len;
> @@ -82,19 +82,19 @@ struct smb_sb_info {
>  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);
>  }
>  
>  #endif
> 
> 
> --
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> 


Seems harmless...

Acked-by: Jeff Layton <jlayton@...hat.com>
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