linux-kernel - Re: [PATCH 1/5] crypto: api - add a helper to (un)register a array of templates

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Date:   Wed, 16 Jan 2019 09:52:36 -0800
From:   Eric Biggers <ebiggers@...nel.org>
To:     Xiongfeng Wang <wangxiongfeng2@...wei.com>
Cc:     herbert@...dor.apana.org.au, davem@...emloft.net,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        broonie@...nel.org, ard.biesheuvel@...aro.org,
        jonathan.cameron@...wei.com
Subject: Re: [PATCH 1/5] crypto: api - add a helper to (un)register a array
 of templates

A few nits:

On Wed, Jan 16, 2019 at 10:50:30AM +0800, Xiongfeng Wang wrote:
> This patch add a helper to (un)register a array of templates. The
> following patches will use this helper to simplify the code.
> 
> Signed-off-by: Xiongfeng Wang <xiongfeng.wang@...aro.org>
> ---
>  crypto/algapi.c         | 27 +++++++++++++++++++++++++++
>  include/crypto/algapi.h |  2 ++
>  2 files changed, 29 insertions(+)
> 
> diff --git a/crypto/algapi.c b/crypto/algapi.c
> index 8b65ada..59a6599 100644
> --- a/crypto/algapi.c
> +++ b/crypto/algapi.c
> @@ -494,6 +494,24 @@ int crypto_register_template(struct crypto_template *tmpl)
>  }
>  EXPORT_SYMBOL_GPL(crypto_register_template);
>  
> +int crypto_register_templates(struct crypto_template *tmpl, int num)

Can you adjust the parameter names to make it consistent with the other bulk
registration functions?

int crypto_register_templates(struct crypto_template *tmpls, int count)

Note the 's' on 'tmpls'.

> +{
> +	int i, err;
> +
> +	for (i = 0; i < num; i++) {
> +		err = crypto_register_template(&tmpl[i]);
> +		if (err)
> +			goto out;
> +	}
> +	return 0;
> +
> +out:
> +	for (i -= 1; i >= 0; i--)

Other places write this as: 'for (--i; i >= 0; --i)'

> +		crypto_unregister_template(&tmpl[i]);
> +	return err;
> +}
> +EXPORT_SYMBOL_GPL(crypto_register_templates);
> +
>  void crypto_unregister_template(struct crypto_template *tmpl)
>  {
>  	struct crypto_instance *inst;
> @@ -523,6 +541,15 @@ void crypto_unregister_template(struct crypto_template *tmpl)
>  }
>  EXPORT_SYMBOL_GPL(crypto_unregister_template);
>  
> +void crypto_unregister_templates(struct crypto_template *tmpl, int num)
> +{

Same here.

> +	int i;
> +
> +	for (i = num - 1; i >= 0; i--)
> +		crypto_unregister_template(&tmpl[i]);
> +}
> +EXPORT_SYMBOL_GPL(crypto_unregister_templates);
> +
>  static struct crypto_template *__crypto_lookup_template(const char *name)
>  {
>  	struct crypto_template *q, *tmpl = NULL;
> diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
> index 4a5ad10..e879a20 100644
> --- a/include/crypto/algapi.h
> +++ b/include/crypto/algapi.h
> @@ -143,7 +143,9 @@ struct ablkcipher_walk {
>  void crypto_mod_put(struct crypto_alg *alg);
>  
>  int crypto_register_template(struct crypto_template *tmpl);
> +int crypto_register_templates(struct crypto_template *tmpl, int num);
>  void crypto_unregister_template(struct crypto_template *tmpl);
> +void crypto_unregister_templates(struct crypto_template *tmpl, int num);

And here.

- Eric