linux-kernel - Re: [PATCH] btrfs: remove unneeded NULL initializer for struct fs

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Message-ID: <20150929123229.GZ11442@twin.jikos.cz>
Date:	Tue, 29 Sep 2015 14:32:29 +0200
From:	David Sterba <dsterba@...e.cz>
To:	Alexandru Moise <00moses.alexander00@...il.com>
Cc:	clm@...com, jbacik@...com, dsterba@...e.com,
	linux-btrfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] btrfs: remove unneeded NULL initializer for struct
 fs_path

On Sat, Sep 26, 2015 at 12:05:19PM +0000, Alexandru Moise wrote:
> fs_path_alloc() either returns an alloc'ed struct fs_path
> or NULL, no need to initialize the pointer to NULL.
> 
> Signed-off-by: Alexandru Moise <00moses.alexander00@...il.com>
> ---
>  fs/btrfs/send.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
> index aa72bfd..0019c90 100644
> --- a/fs/btrfs/send.c
> +++ b/fs/btrfs/send.c
> @@ -2230,7 +2230,7 @@ static int get_cur_path(struct send_ctx *sctx, u64 ino, u64 gen,
>  			struct fs_path *dest)
>  {
>  	int ret = 0;
> -	struct fs_path *name = NULL;
> +	struct fs_path *name;

I'd rather see all such instances fixed in one patch. Quick grep
revealed a few more. OTOH this kind of extra initialization is harmless
and sometimes help readability, it's clear that he value is zeroed.
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