linux-kernel - Re: linux-next: build warning after merge of the btrfs-kdave tree

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Date:   Mon, 26 Nov 2018 08:56:11 +0100
From:   Christoph Hellwig <hch@....de>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     David Sterba <dsterba@...e.cz>, Kees Cook <keescook@...gle.com>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Christoph Hellwig <hch@....de>
Subject: Re: linux-next: build warning after merge of the btrfs-kdave tree

On Mon, Nov 26, 2018 at 11:06:29AM +1100, Stephen Rothwell wrote:
> Introduced by commit
> 
>   cf8cddd38bab3 ("btrfs: don't abuse REQ_OP_* flags for btrfs_map_block")
> 
> exposed by my new use of -Wimplicit-fallthrough
> 
> I am not sure why this has only turned up now (as opposed to earlier
> today).

It looks like something only in linux-next moved the code around a bit.

Either way the fallthough looks fine, it will just need a little
/*FALLTHRU*/ annotation.