linux-kernel - Re: [PATCH] crypto: xor - Remove unused variable count in do_xor

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Date:   Tue, 6 Oct 2020 14:35:44 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Nathan Chancellor <natechancellor@...il.com>
Cc:     Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Ard Biesheuvel <ardb@...nel.org>,
        Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        clang-built-linux@...glegroups.com
Subject: Re: [PATCH] crypto: xor - Remove unused variable count in do_xor_speed

Hi,

On Tue, Oct 6, 2020 at 12:59 PM Nathan Chancellor
<natechancellor@...il.com> wrote:
>
> Clang warns:
>
> crypto/xor.c:101:4: warning: variable 'count' is uninitialized when used
> here [-Wuninitialized]
>                         count++;
>                         ^~~~~
> crypto/xor.c:86:17: note: initialize the variable 'count' to silence
> this warning
>         int i, j, count;
>                        ^
>                         = 0
> 1 warning generated.
>
> After the refactoring to use ktime that happened in this function, count
> is only assigned, never read. Just remove the variable to get rid of the
> warning.
>
> Fixes: c055e3eae0f1 ("crypto: xor - use ktime for template benchmarking")
> Link: https://github.com/ClangBuiltLinux/linux/issues/1171
> Signed-off-by: Nathan Chancellor <natechancellor@...il.com>
> ---
>  crypto/xor.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)

Whoops!  Sorry for missing this in my review.

Reviewed-by: Douglas Anderson <dianders@...omium.org>