Quoting Mika Kuoppala (2017-10-19 15:39:41)
> +#define __port_add(start, n, mask) (((start) + (n)) & (mask))
> +#define port_head_add(e, n) __port_add((e)->port_head, n, (e)->port_mask)
> +
> +/* Index starting from port_head */
> +static inline struct execlist_port *
> +execlists_port(struct intel_engine_execlists * const execlists,
> + const unsigned int n)
> +{
> + return &execlists->port[port_head_add(execlists, n)];
nth_port cf nth_page?
-Chris
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