linux-kernel - Re: [PATCH v2 1/8] block: introduce blk_ksm_is

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Date:   Thu, 15 Apr 2021 12:21:02 -0700
From:   Eric Biggers <ebiggers@...nel.org>
To:     Satya Tangirala <satyat@...gle.com>
Cc:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jens Axboe <axboe@...nel.dk>
Subject: Re: [PATCH v2 1/8] block: introduce blk_ksm_is_empty()

On Thu, Mar 25, 2021 at 09:26:02PM +0000, Satya Tangirala wrote:
> This function checks if a given keyslot manager supports any encryption
> mode/data unit size combination (and returns true if there is no such
> supported combination). Helps clean up code a little.
> 
> Signed-off-by: Satya Tangirala <satyat@...gle.com>
> ---
>  block/keyslot-manager.c         | 13 +++++++++++++
>  drivers/md/dm-table.c           | 11 +----------
>  include/linux/keyslot-manager.h |  2 ++
>  3 files changed, 16 insertions(+), 10 deletions(-)
> 
> diff --git a/block/keyslot-manager.c b/block/keyslot-manager.c
> index 2c4a55bea6ca..2a2b1a9785d2 100644
> --- a/block/keyslot-manager.c
> +++ b/block/keyslot-manager.c
> @@ -437,6 +437,19 @@ void blk_ksm_destroy(struct blk_keyslot_manager *ksm)
>  }
>  EXPORT_SYMBOL_GPL(blk_ksm_destroy);
>  
> +bool blk_ksm_is_empty(struct blk_keyslot_manager *ksm)
> +{

I agree with Christoph that this could use a kerneldoc comment.

> diff --git a/include/linux/keyslot-manager.h b/include/linux/keyslot-manager.h
> index a27605e2f826..5bf0cea20c81 100644
> --- a/include/linux/keyslot-manager.h
> +++ b/include/linux/keyslot-manager.h
> @@ -117,4 +117,6 @@ bool blk_ksm_is_superset(struct blk_keyslot_manager *ksm_superset,
>  void blk_ksm_update_capabilities(struct blk_keyslot_manager *target_ksm,
>  				 struct blk_keyslot_manager *reference_ksm);
>  
> +bool blk_ksm_is_empty(struct blk_keyslot_manager *ksm);
> +

It's easier to read if declarations are kept in the same order as the
definitions.

- Eric