[PATCH RFC 2/6] x86/hyper-v: add a function to read both TSC and TSC page value simulateneously

Stephen Hemminger stephen at networkplumber.org
Fri Dec 1 17:29:04 UTC 2017


On Fri,  1 Dec 2017 14:13:17 +0100
Vitaly Kuznetsov <vkuznets at redhat.com> wrote:

> +
> +static inline u64 hv_read_tsc_page_tsc(const struct ms_hyperv_tsc_page *tsc_pg,
> +				       u64 *cur_tsc)
> +{
> +	*cur_tsc = rdtsc();
> +
> +	return cur_tsc;

Why do return and setting by reference. Looks like an ugly API.


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