linux-kernel - Re: [PATCH 3/4] crypto: sun8i-ce-cipher - use IS

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Message-ID: <aAuOdDhpnLE5bM_y@Red>
Date: Fri, 25 Apr 2025 15:30:28 +0200
From: Corentin Labbe <clabbe.montjoie@...il.com>
To: Ovidiu Panait <ovidiu.panait.oss@...il.com>
Cc: herbert@...dor.apana.org.au, davem@...emloft.net,
	linux-crypto@...r.kernel.org, wens@...e.org,
	jernej.skrabec@...il.com, samuel@...lland.org,
	linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] crypto: sun8i-ce-cipher - use IS_ENABLED() checks
 for debugfs stats

Le Fri, Apr 25, 2025 at 03:45:16PM +0300, Ovidiu Panait a écrit :
> Add IS_ENABLED(CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG) checks before the
> fallback counter updates to make sure the code is not included when
> debugfs statistics support is not enabled.
> 
> Also, drop the existing ifdef guards, since 'struct sun8i_ce_alg_template'
> is always defined, even with CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG disabled.
> 
> Signed-off-by: Ovidiu Panait <ovidiu.panait.oss@...il.com>
> ---
>  .../allwinner/sun8i-ce/sun8i-ce-cipher.c      | 46 ++++++++++++-------
>  1 file changed, 30 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c
> index f03a8fa7bfa2..433cd18f0b5b 100644
> --- a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c
> +++ b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-cipher.c
> @@ -34,22 +34,30 @@ static int sun8i_ce_cipher_need_fallback(struct skcipher_request *areq)
>  
>  	if (sg_nents_for_len(areq->src, areq->cryptlen) > MAX_SG ||
>  	    sg_nents_for_len(areq->dst, areq->cryptlen) > MAX_SG) {
> -		algt->stat_fb_maxsg++;
> +		if (IS_ENABLED(CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG))
> +			algt->stat_fb_maxsg++;
> +
>  		return true;
>  	}
>  
>  	if (areq->cryptlen < crypto_skcipher_ivsize(tfm)) {
> -		algt->stat_fb_leniv++;
> +		if (IS_ENABLED(CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG))
> +			algt->stat_fb_leniv++;
> +
>  		return true;
>  	}
>  
>  	if (areq->cryptlen == 0) {
> -		algt->stat_fb_len0++;
> +		if (IS_ENABLED(CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG))
> +			algt->stat_fb_len0++;
> +
>  		return true;
>  	}
>  
>  	if (areq->cryptlen % 16) {
> -		algt->stat_fb_mod16++;
> +		if (IS_ENABLED(CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG))
> +			algt->stat_fb_mod16++;
> +
>  		return true;
>  	}
>  
> @@ -57,12 +65,16 @@ static int sun8i_ce_cipher_need_fallback(struct skcipher_request *areq)
>  	sg = areq->src;
>  	while (sg) {
>  		if (!IS_ALIGNED(sg->offset, sizeof(u32))) {
> -			algt->stat_fb_srcali++;
> +			if (IS_ENABLED(CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG))
> +				algt->stat_fb_srcali++;
> +
>  			return true;
>  		}
>  		todo = min(len, sg->length);
>  		if (todo % 4) {
> -			algt->stat_fb_srclen++;
> +			if (IS_ENABLED(CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG))
> +				algt->stat_fb_srclen++;
> +
>  			return true;
>  		}
>  		len -= todo;
> @@ -73,12 +85,16 @@ static int sun8i_ce_cipher_need_fallback(struct skcipher_request *areq)
>  	sg = areq->dst;
>  	while (sg) {
>  		if (!IS_ALIGNED(sg->offset, sizeof(u32))) {
> -			algt->stat_fb_dstali++;
> +			if (IS_ENABLED(CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG))
> +				algt->stat_fb_dstali++;
> +
>  			return true;
>  		}
>  		todo = min(len, sg->length);
>  		if (todo % 4) {
> -			algt->stat_fb_dstlen++;
> +			if (IS_ENABLED(CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG))
> +				algt->stat_fb_dstlen++;
> +
>  			return true;
>  		}
>  		len -= todo;
> @@ -101,9 +117,7 @@ static int sun8i_ce_cipher_fallback(struct skcipher_request *areq)
>  		algt = container_of(alg, struct sun8i_ce_alg_template,
>  				    alg.skcipher.base);
>  
> -#ifdef CONFIG_CRYPTO_DEV_SUN8I_CE_DEBUG
>  		algt->stat_fb++;
> -#endif

Hello

You put IS_ENABLED everywhere, but here you remove it, why ?
I think you forgot it.

Thanks
Regards