[dpdk-dev] [dpdk-stable] [PATCH v3 1/3] test/rcu: fix the compiling error for armv8.2

[Thomas Monjalon]

11/11/2019 06:41, Gavin Hu:
> With "-march=armv8.2-a" specified, a compiling error generated:
> app/test/test_rcu_qsbr.c:234:10: error: comparison of integer
> expressions of different signedness: ‘unsigned int’ and ‘int’
> [-Werror=sign-compare]
> 
> Fixes: b87089b0bb19 ("test/rcu: add API and functional tests")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Gavin Hu <gavin.hu at arm.com>
> Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli at arm.com>
> Reviewed-by: Steve Capper <steve.capper at arm.com>
> ---
> --- a/app/test/test_rcu_qsbr.c
> +++ b/app/test/test_rcu_qsbr.c
>  			/* Skip one update */
> -			if (i == (RTE_MAX_LCORE - 10))
> +			if (i == (unsigned int)(RTE_MAX_LCORE - 10))

For N1 SDP, RTE_MAX_LCORE = 4.
So this test weird.
Why not using rand() to find a number between 0 and max ?

You are hiding a real failure with a forced type casting.

Please reviewers, explain why you think it is the right thing to do?