linux-kernel - Re: [PATCH] exofs: Fix "add bdi backing to mount session" fall out

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Date:	Thu, 29 Apr 2010 12:43:44 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Boaz Harrosh <bharrosh@...asas.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-fsdevel <linux-fsdevel@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] exofs: Fix "add bdi backing to mount session" fall out

On Thu, Apr 29 2010, Boaz Harrosh wrote:
> 
> The patch: add bdi backing to mount session
> 	(b3d0ab7e60d1865bb6f6a79a77aaba22f2543236)
> 
> Has a bug in the placement of the bdi member at
> struct exofs_sb_info. The layout member must be kept
> last.
> 
> Signed-off-by: Boaz Harrosh <bharrosh@...asas.com>
> ---
>  fs/exofs/exofs.h |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/fs/exofs/exofs.h b/fs/exofs/exofs.h
> index 5437327..22721b2 100644
> --- a/fs/exofs/exofs.h
> +++ b/fs/exofs/exofs.h
> @@ -85,6 +85,7 @@ struct exofs_sb_info {
>  	u32		s_next_generation;	/* next gen # to use          */
>  	atomic_t	s_curr_pending;		/* number of pending commands */
>  	uint8_t		s_cred[OSD_CAP_LEN];	/* credential for the fscb    */
> +	struct 		backing_dev_info bdi;	/* register our bdi with VFS  */
>  
>  	struct pnfs_osd_data_map data_map;	/* Default raid to use
>  						 * FIXME: Needed ?
> @@ -93,7 +94,6 @@ struct exofs_sb_info {
>  	struct exofs_layout	layout;		/* Default files layout,
>  						 * contains the variable osd_dev
>  						 * array. Keep last */
> -	struct backing_dev_info bdi;
>  	struct osd_dev	*_min_one_dev[1];	/* Place holder for one dev   */
>  };

Irk, silly mistake. Apparently I missed the comment, and I did move it
prior to _min_one_dev[] but didn't think enough about it.

Acked-by: Jens Axboe <jens.axboe@...cle.com>

-- 
Jens Axboe

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