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Date:   Mon, 7 Oct 2019 17:03:40 +0200
From:   David Sterba <dsterba@suse.cz>
To:     Austin Kim <austindh.kim@gmail.com>
Cc:     clm@fb.com, josef@toxicpanda.com, dsterba@suse.com,
        linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] btrfs: fix Wmaybe-uninitialized warning
Message-ID: <20191007150340.GA2751@twin.jikos.cz>
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References: <20190903033019.GA149622@LGEARND20B15>
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On Tue, Sep 03, 2019 at 12:30:19PM +0900, Austin Kim wrote:
> gcc throws warning message as below:
> 
> ‘clone_src_i_size’ may be used uninitialized in this function
> [-Wmaybe-uninitialized]
>  #define IS_ALIGNED(x, a)  (((x) & ((typeof(x))(a) - 1)) == 0)
>                        ^
> fs/btrfs/send.c:5088:6: note: ‘clone_src_i_size’ was declared here
>  u64 clone_src_i_size;
>    ^
> The clone_src_i_size is only used as call-by-reference
> in a call to get_inode_info().
> 
> Silence the warning by initializing clone_src_i_size to 0.
> 
> Signed-off-by: Austin Kim <austindh.kim@gmail.com>

A few more people have repoted this warning, so I'm gonig to apply the
patch to avoid further reports. Thanks.