Re: [PATCH 2/2] compat.bpf.h: add scx_bpf_reenqueue_local_from_anywhere() compat helper

[Tejun Heo]

Hello, Changwoo.

On Mon, Aug 17, 2026 at 11:31:26PM +0900, Changwoo Min wrote:
> +	if (__COMPAT_scx_bpf_reenqueue_local_from_anywhere()) {
> +		scx_bpf_reenqueue_local___v2___compat();
> +		return 0;
> +	}
> +	return -ENOTSUP;

ENOTSUP is glibc-only. The BPF side picks up errno constants through
asm-generic/errno.h (see common.bpf.h), which only defines EOPNOTSUPP,
and as static inline bodies are checked in every TU whether called or
not, this breaks the BPF build for every scheduler. Use -EOPNOTSUPP like
__COMPAT_bpf_cpumask_populate() in the same file and update the
description accordingly. The pending scx-side PR needs the same fix.

The rest of the patch looks good to me.

Thanks.

--
tejun