linux-kernel - Re: [PATCH 06/20] block: Bring back zero_fill_bio

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Date:   Mon, 24 Jul 2023 10:35:45 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Kent Overstreet <kent.overstreet@...ux.dev>
Cc:     linux-bcachefs@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Kent Overstreet <kent.overstreet@...il.com>,
        Jens Axboe <axboe@...nel.dk>, linux-block@...r.kernel.org
Subject: Re: [PATCH 06/20] block: Bring back zero_fill_bio_iter

On Wed, Jul 12, 2023 at 05:11:01PM -0400, Kent Overstreet wrote:
> From: Kent Overstreet <kent.overstreet@...il.com>
> 
> This reverts 6f822e1b5d9dda3d20e87365de138046e3baa03a - this helper is
> used by bcachefs.
> 
> Signed-off-by: Kent Overstreet <kent.overstreet@...ux.dev>
> Cc: Jens Axboe <axboe@...nel.dk>
> Cc: linux-block@...r.kernel.org
> ---
>  block/bio.c         | 6 +++---
>  include/linux/bio.h | 7 ++++++-
>  2 files changed, 9 insertions(+), 4 deletions(-)

I really don't see any point in offering this in the block layer.  By
the lack of any other caller it obviously isn't such a generic and
always used helper, but more importantly it literally is three lines
of code to implement it.