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Date:   Thu, 30 Apr 2020 01:48:26 +0200
From:   David Sterba <dsterba@suse.cz>
To:     Arnd Bergmann <arnd@arndb.de>
Cc:     Chris Mason <clm@fb.com>, Josef Bacik <josef@toxicpanda.com>,
        David Sterba <dsterba@suse.com>,
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        Filipe Manana <fdmanana@suse.com>, linux-btrfs@vger.kernel.org,
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Subject: Re: [PATCH] btrfs: fix gcc-4.8 build warning
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On Wed, Apr 29, 2020 at 03:27:32PM +0200, Arnd Bergmann wrote:
> Some older compilers like gcc-4.8 warn about mismatched curly
> braces in a initializer:
> 
> fs/btrfs/backref.c: In function 'is_shared_data_backref':
> fs/btrfs/backref.c:394:9: error: missing braces around
> initializer [-Werror=missing-braces]
>   struct prelim_ref target = {0};
>          ^
> fs/btrfs/backref.c:394:9: error: (near initialization for
> 'target.rbnode') [-Werror=missing-braces]
> 
> Use the GNU empty initializer extension to avoid this.
> 
> Fixes: ed58f2e66e84 ("btrfs: backref, don't add refs from shared block when resolving normal backref")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Added to devel queue, thanks.