On Fri, Sep 06, 2019 at 10:15:32AM -0700, Mark Fasheh wrote:
> From: Mark Fasheh <mfas...@suse.de>
> 
> build_backref_tree() is walking extent refs in what is an otherwise self
> contained chunk of code.  We can shrink the total number of lines in
> build_backref_tree() *and* make it more readable by moving that walk into
> its own subroutine.
> 
> Signed-off-by: Mark Fasheh <mfas...@suse.de>
> ---
>  fs/btrfs/backref-cache.c | 110 +++++++++++++++++++++++----------------
>  1 file changed, 65 insertions(+), 45 deletions(-)
> 
> diff --git a/fs/btrfs/backref-cache.c b/fs/btrfs/backref-cache.c
> index d0f6530f23b8..ff0d49ca6e26 100644
> --- a/fs/btrfs/backref-cache.c
> +++ b/fs/btrfs/backref-cache.c
> @@ -336,6 +336,61 @@ int find_inline_backref(struct extent_buffer *leaf, int 
> slot,
>       return 0;
>  }
>  
> +#define SEARCH_COMPLETE      1
> +#define SEARCH_NEXT  2
> +static int find_next_ref(struct btrfs_root *extent_root, u64 cur_bytenr,
> +                      struct btrfs_path *path, unsigned long *ptr,
> +                      unsigned long *end, struct btrfs_key *key, bool exist)

I'd rather we do an enum here, so it's clear what we're expecting in the code
context.  Thanks,

Josef

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