On Tue, 6 Oct 2020 at 21:59, Nathan Chancellor <natechancellor@xxxxxxxxx> 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@xxxxxxxxx>
Acked-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
> ---
> crypto/xor.c | 4 +---
> 1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/crypto/xor.c b/crypto/xor.c
> index a0badbc03577..eacbf4f93990 100644
> --- a/crypto/xor.c
> +++ b/crypto/xor.c
> @@ -83,7 +83,7 @@ static void __init
> do_xor_speed(struct xor_block_template *tmpl, void *b1, void *b2)
> {
> int speed;
> - int i, j, count;
> + int i, j;
> ktime_t min, start, diff;
>
> tmpl->next = template_list;
> @@ -98,8 +98,6 @@ do_xor_speed(struct xor_block_template *tmpl, void *b1, void *b2)
> mb(); /* prevent loop optimzation */
> tmpl->do_2(BENCH_SIZE, b1, b2);
> mb();
> - count++;
> - mb();
> }
> diff = ktime_sub(ktime_get(), start);
> if (diff < min)
>
> base-commit: ed4424f2fb02497b0ea92bf58c533c598c0da1d3
> --
> 2.29.0.rc0
>
