linux-kernel - Re: [PATCH -next] crypto: nx842 - remove set but not used variables 'dpadding' and 'max_sync

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Message-ID: <e69b2afd-8697-f51c-af4a-89b262f4d3d9@codeaurora.org>
Date:   Sat, 30 Mar 2019 15:28:39 +0530
From:   Mukesh Ojha <mojha@...eaurora.org>
To:     Yue Haibing <yuehaibing@...wei.com>, haren@...ibm.com,
        herbert@...dor.apana.org.au, davem@...emloft.net,
        benh@...nel.crashing.org, paulus@...ba.org, mpe@...erman.id.au
Cc:     linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH -next] crypto: nx842 - remove set but not used variables
 'dpadding' and 'max_sync_size'


On 3/30/2019 11:24 AM, Yue Haibing wrote:
> From: YueHaibing <yuehaibing@...wei.com>
>
> Fixes gcc '-Wunused-but-set-variable' warning:
>
> drivers/crypto/nx/nx-842.c: In function 'decompress':
> drivers/crypto/nx/nx-842.c:356:25: warning: variable 'dpadding' set but not used [-Wunused-but-set-variable]
> drivers/crypto/nx/nx-842-pseries.c: In function 'nx842_pseries_compress':
> drivers/crypto/nx/nx-842-pseries.c:299:15: warning: variable 'max_sync_size' set but not used [-Wunused-but-set-variable]
> drivers/crypto/nx/nx-842-pseries.c: In function 'nx842_pseries_decompress':
> drivers/crypto/nx/nx-842-pseries.c:430:15: warning: variable 'max_sync_size' set but not used [-Wunused-but-set-variable]
>
> They are not used any more and can be removed.
>
> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
Reviewed-by: Mukesh Ojha <mojha@...eaurora.org>

Cheers,
-Mukesh
> ---
>   drivers/crypto/nx/nx-842-pseries.c | 6 ++----
>   drivers/crypto/nx/nx-842.c         | 3 +--
>   2 files changed, 3 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/crypto/nx/nx-842-pseries.c b/drivers/crypto/nx/nx-842-pseries.c
> index 6686997..5793284 100644
> --- a/drivers/crypto/nx/nx-842-pseries.c
> +++ b/drivers/crypto/nx/nx-842-pseries.c
> @@ -296,7 +296,7 @@ static int nx842_pseries_compress(const unsigned char *in, unsigned int inlen,
>   	struct nx842_workmem *workmem;
>   	struct nx842_scatterlist slin, slout;
>   	struct nx_csbcpb *csbcpb;
> -	int ret = 0, max_sync_size;
> +	int ret = 0;
>   	unsigned long inbuf, outbuf;
>   	struct vio_pfo_op op = {
>   		.done = NULL,
> @@ -319,7 +319,6 @@ static int nx842_pseries_compress(const unsigned char *in, unsigned int inlen,
>   		rcu_read_unlock();
>   		return -ENODEV;
>   	}
> -	max_sync_size = local_devdata->max_sync_size;
>   	dev = local_devdata->dev;
>   
>   	/* Init scatterlist */
> @@ -427,7 +426,7 @@ static int nx842_pseries_decompress(const unsigned char *in, unsigned int inlen,
>   	struct nx842_workmem *workmem;
>   	struct nx842_scatterlist slin, slout;
>   	struct nx_csbcpb *csbcpb;
> -	int ret = 0, max_sync_size;
> +	int ret = 0;
>   	unsigned long inbuf, outbuf;
>   	struct vio_pfo_op op = {
>   		.done = NULL,
> @@ -451,7 +450,6 @@ static int nx842_pseries_decompress(const unsigned char *in, unsigned int inlen,
>   		rcu_read_unlock();
>   		return -ENODEV;
>   	}
> -	max_sync_size = local_devdata->max_sync_size;
>   	dev = local_devdata->dev;
>   
>   	workmem = PTR_ALIGN(wmem, WORKMEM_ALIGN);
> diff --git a/drivers/crypto/nx/nx-842.c b/drivers/crypto/nx/nx-842.c
> index d94e25d..f06565d 100644
> --- a/drivers/crypto/nx/nx-842.c
> +++ b/drivers/crypto/nx/nx-842.c
> @@ -353,7 +353,7 @@ static int decompress(struct nx842_crypto_ctx *ctx,
>   	unsigned int adj_slen = slen;
>   	u8 *src = p->in, *dst = p->out;
>   	u16 padding = be16_to_cpu(g->padding);
> -	int ret, spadding = 0, dpadding = 0;
> +	int ret, spadding = 0;
>   	ktime_t timeout;
>   
>   	if (!slen || !required_len)
> @@ -413,7 +413,6 @@ static int decompress(struct nx842_crypto_ctx *ctx,
>   		spadding = 0;
>   		dst = p->out;
>   		dlen = p->oremain;
> -		dpadding = 0;
>   		if (dlen < required_len) { /* have ignore bytes */
>   			dst = ctx->dbounce;
>   			dlen = BOUNCE_BUFFER_SIZE;