linux-kernel - Re: [PATCH 1/1] nilfs2: Deletion of an unnecessary check before the function call "iput"

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Message-Id: <20141119.090954.206625370231465945.konishi.ryusuke@lab.ntt.co.jp>
Date:	Wed, 19 Nov 2014 09:09:54 +0900 (JST)
From:	Ryusuke Konishi <konishi.ryusuke@....ntt.co.jp>
To:	SF Markus Elfring <elfring@...rs.sourceforge.net>
Cc:	linux-nilfs@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org, cocci@...teme.lip6.fr
Subject: Re: [PATCH 1/1] nilfs2: Deletion of an unnecessary check before
 the function call "iput"

On Tue, 18 Nov 2014 14:48:09 +0100, SF Markus Elfring wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Tue, 18 Nov 2014 14:41:27 +0100
> 
> The iput() function tests whether its argument is NULL and then
> returns immediately. Thus the test around the call is not needed.
> 
> This issue was detected by using the Coccinelle software.
> 
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>

Applied to nilfs2 git tree.  Thanks.

Ryusuke Konishi


> ---
>  fs/nilfs2/the_nilfs.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/fs/nilfs2/the_nilfs.c b/fs/nilfs2/the_nilfs.c
> index 9da25fe..69bd801 100644
> --- a/fs/nilfs2/the_nilfs.c
> +++ b/fs/nilfs2/the_nilfs.c
> @@ -808,8 +808,7 @@ void nilfs_put_root(struct nilfs_root *root)
>  		spin_lock(&nilfs->ns_cptree_lock);
>  		rb_erase(&root->rb_node, &nilfs->ns_cptree);
>  		spin_unlock(&nilfs->ns_cptree_lock);
> -		if (root->ifile)
> -			iput(root->ifile);
> +		iput(root->ifile);
>  
>  		kfree(root);
>  	}
> -- 
> 2.1.3
> 
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