cfq-iosched: document the cfqq flags

};

enum cfqq_state_flags {

	CFQ_CFQQ_FLAG_on_rr = 0,

	CFQ_CFQQ_FLAG_wait_request,

	CFQ_CFQQ_FLAG_must_alloc,

	CFQ_CFQQ_FLAG_must_alloc_slice,

	CFQ_CFQQ_FLAG_must_dispatch,

	CFQ_CFQQ_FLAG_fifo_expire,

	CFQ_CFQQ_FLAG_idle_window,

	CFQ_CFQQ_FLAG_prio_changed,

	CFQ_CFQQ_FLAG_queue_new,

	CFQ_CFQQ_FLAG_on_rr = 0,	/* on round-robin busy list */

	CFQ_CFQQ_FLAG_wait_request,	/* waiting for a request */

	CFQ_CFQQ_FLAG_must_alloc,	/* must be allowed rq alloc */

	CFQ_CFQQ_FLAG_must_alloc_slice,	/* per-slice must_alloc flag */

	CFQ_CFQQ_FLAG_must_dispatch,	/* must dispatch, even if expired */

	CFQ_CFQQ_FLAG_fifo_expire,	/* FIFO checked in this slice */

	CFQ_CFQQ_FLAG_idle_window,	/* slice idling enabled */

	CFQ_CFQQ_FLAG_prio_changed,	/* task priority has changed */

	CFQ_CFQQ_FLAG_queue_new,	/* queue never been serviced */

};

#define CFQ_CFQQ_FNS(name)						\