linux-kernel - Re: [PATCH] gfs2: fix assertion in log

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Date:	Fri, 18 Apr 2008 17:42:05 +0100
From:	Steven Whitehouse <swhiteho@...hat.com>
To:	Roel Kluin <12o3l@...cali.nl>
Cc:	cluster-devel@...hat.com, lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] gfs2: fix assertion in log_refund()

Hi,

Now in the GFS2 -nmw git tree, which I'm just about to send a pull
request for,

Steve.

On Thu, 2008-04-17 at 17:25 +0200, Roel Kluin wrote:
> since unsigned, unused >= 0 is always true.
> 
> Signed-off-by: Roel Kluin <12o3l@...cali.nl>
> ---
> diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c
> index 161ab6f..211dc2d 100644
> --- a/fs/gfs2/log.c
> +++ b/fs/gfs2/log.c
> @@ -769,8 +769,8 @@ static void log_refund(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
>  	sdp->sd_log_commited_revoke += tr->tr_num_revoke - tr->tr_num_revoke_rm;
>  	gfs2_assert_withdraw(sdp, ((int)sdp->sd_log_commited_revoke) >= 0);
>  	reserved = calc_reserved(sdp);
> +	gfs2_assert_withdraw(sdp, sdp->sd_log_blks_reserved + tr->tr_reserved >= reserved);
>  	unused = sdp->sd_log_blks_reserved - reserved + tr->tr_reserved;
> -	gfs2_assert_withdraw(sdp, unused >= 0);
>  	atomic_add(unused, &sdp->sd_log_blks_free);
>  	gfs2_assert_withdraw(sdp, atomic_read(&sdp->sd_log_blks_free) <=
>  			     sdp->sd_jdesc->jd_blocks);

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