linux-kernel - Re: [PATCH] fs: ocfs2: dir.c: Cleaning up uninitialized variables

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Message-Id: <20140602132216.292fd8363da83b48e90a78ba@linux-foundation.org>
Date:	Mon, 2 Jun 2014 13:22:16 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
Cc:	Mark Fasheh <mfasheh@...e.com>, Joel Becker <jlbec@...lplan.org>,
	ocfs2-devel@....oracle.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fs: ocfs2: dir.c:  Cleaning up uninitialized variables

On Sun,  1 Jun 2014 15:53:04 +0200 Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se> wrote:

> There is a risk that the variable will be used without being initialized.

um, no there isn't.

> --- a/fs/ocfs2/dir.c
> +++ b/fs/ocfs2/dir.c
> @@ -3738,7 +3738,7 @@ static int ocfs2_dx_dir_rebalance(struct ocfs2_super *osb, struct inode *dir,
>  	int credits, ret, i, num_used, did_quota = 0;
>  	u32 cpos, split_hash, insert_hash = hinfo->major_hash;
>  	u64 orig_leaves_start;
> -	int num_dx_leaves;
> +	int num_dx_leaves = 0;
>  	struct buffer_head **orig_dx_leaves = NULL;
>  	struct buffer_head **new_dx_leaves = NULL;
>  	struct ocfs2_alloc_context *data_ac = NULL, *meta_ac = NULL;

If ocfs2_dx_dir_kmalloc_leaves() returns non-zero, num_dx_leaves will
have been initialized.

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