On Mon, Feb 1, 2021 at 7:00 AM Brendan Jackman <jackmanb@xxxxxxxxxx> wrote:
> +
> +SEC("fentry/bpf_fentry_test1")
> +int BPF_PROG(sub, int x)
> +{
> + int a = 0;
> + int b = __sync_fetch_and_add(&a, 1);
It probably needs ENABLE_ATOMICS_TESTS ?
Otherwise clang without -mcpu=v3 will complain:
"fatal error: error in backend: Invalid usage of the XADD return value"
