linux-kernel - Re: [PATCH 5/9] crypto: qce: Adds sha and hmac transforms

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Date:	Fri, 11 Apr 2014 13:12:27 -0700
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Stanimir Varbanov <svarbanov@...sol.com>
Cc:	Herbert Xu <herbert@...dor.apana.org.au>,
	"David S. Miller" <davem@...emloft.net>,
	linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
	linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 5/9] crypto: qce: Adds sha and hmac transforms

On 04/10, Stanimir Varbanov wrote:
> On 04/09/2014 03:09 AM, Stephen Boyd wrote:
> > On 04/03, Stanimir Varbanov wrote:
> > 
> >> +
> >> +	return 0;
> >> +}
> >> +
> >> +static int qce_ahash_import(struct ahash_request *req, const void *in)
> >> +{
> >> +	struct qce_sha_reqctx *rctx = ahash_request_ctx(req);
> >> +	u32 flags = rctx->flags;
> >> +	bool hmac = IS_SHA_HMAC(flags);
> >> +	int ret;
> >> +
> >> +	if (IS_SHA1(flags) || IS_SHA1_HMAC(flags)) {
> >> +		struct sha1_state *state = (struct sha1_state *)in;
> > 
> > Unnecessary cast from void *.
> 
> Nope, "in" is "const void *". Cast is needed to avoid compiler warnings.
> 

Ouch. Why are we casting away const? It should be possible to
make qce_import_common() take const state and buffer arguments?

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