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Date: Mon, 25 Aug 2014 21:09:21 -0700
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH 1/4] xfs: refactor xlog_recover_process_data()
Message-ID: <20140826040921.GA9591@infradead.org>
References: <1409016101-9511-1-git-send-email-david@fromorbit.com>
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To: Dave Chinner <david@fromorbit.com>
Cc: xfs@oss.sgi.com

> @@ -3556,14 +3622,10 @@ xlog_recover_process_data(
>  	xfs_caddr_t		dp,
>  	int			pass)
>  {
> +	struct xlog_op_header	*ohead;
>  	xfs_caddr_t		lp;
>  	int			num_logops;
>  	int			error;
>  
>  	lp = dp + be32_to_cpu(rhead->h_len);
>  	num_logops = be32_to_cpu(rhead->h_num_logops);
> @@ -3573,69 +3635,24 @@ xlog_recover_process_data(
>  		return -EIO;
>  
>  	while ((dp < lp) && num_logops) {
> +		ASSERT(dp + sizeof(struct xlog_op_header) <= lp);
> +
> +		ohead = (struct xlog_op_header *)dp;
> +		dp += sizeof(*ohead);

Using sizeof type and sizeof variable for the same thing right next
to each other seems weird.  Also why duplicate the addition instead
of moving it below the assignment:

		ohead = (struct xlog_op_header *)dp;
		dp += sizeof(*ohead);

		ASSERT(dp <= lp);

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