Re: [PATCH v10 7/7] x86/tsc: use tsc early

[Peter Zijlstra]

On Wed, Jun 20, 2018 at 01:52:10AM +0200, Thomas Gleixner wrote:
>  u64 native_sched_clock(void)
>  {
> +	if (static_branch_likely(&__use_tsc))
> +		return cycles_2_ns(rdtsc());
>  
> +	if (static_branch_unlikely(&tsc_early_enabled)) {
> +		if (tsc_early_sched_clock)
> +			return cycles_2_ns(rdtsc());
>  	}

I'm still puzzled by the entire need for tsc_early_enabled and all that.
Esp. since both branches do the exact same thing:

	return cycles_2_ns(rdtsc());