linux-kernel - Re: [PATCH v7 4/4] crypto: starfive

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Message-ID: <ZGGz4YFDMKQThG2x@gondor.apana.org.au>
Date:   Mon, 15 May 2023 12:24:01 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Jia Jie Ho <jiajie.ho@...rfivetech.com>
Cc:     "David S . Miller" <davem@...emloft.net>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Emil Renner Berthing <kernel@...il.dk>,
        Conor Dooley <conor@...nel.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        linux-crypto@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v7 4/4] crypto: starfive - Add hash and HMAC support

On Mon, May 15, 2023 at 11:27:35AM +0800, Jia Jie Ho wrote:
>
> I've added COMPILE_TEST in the Kconfig, then ran make W=1, sparse and smatch.
> However it did not produce the error message.

I guess you weren't testing on a 64-bit platform.  BIT(2) is
an unsigned long, so ~BIT(2) is 64-bit long on 64-bit platforms.

You're trying to feed it into writel which takes a 32-bit value,
hence the warning.

If you have to use the BIT macro, then you need to cast the result
to u32:

#define STARFIVE_IE_MASK_HASH_DONE ((u32)BIT(2))

But it's probably a lot clearer if you do it as:

#define STARFIVE_IE_MASK_HASH_DONE 0x4

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt