cfq-iosched: kill two unused cfqq flags

We only manipulate the must_dispatch and queue_new flags, they are not
tested anymore. So get rid of them.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index a0102a5..11efcf1 100644 (file)
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -179,11 +179,9 @@ enum cfqq_state_flags {
        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 */
        CFQ_CFQQ_FLAG_slice_new,        /* no requests dispatched in slice */
        CFQ_CFQQ_FLAG_sync,             /* synchronous queue */
 };
@@ -206,11 +204,9 @@ CFQ_CFQQ_FNS(on_rr);
 CFQ_CFQQ_FNS(wait_request);
 CFQ_CFQQ_FNS(must_alloc);
 CFQ_CFQQ_FNS(must_alloc_slice);
-CFQ_CFQQ_FNS(must_dispatch);
 CFQ_CFQQ_FNS(fifo_expire);
 CFQ_CFQQ_FNS(idle_window);
 CFQ_CFQQ_FNS(prio_changed);
-CFQ_CFQQ_FNS(queue_new);
 CFQ_CFQQ_FNS(slice_new);
 CFQ_CFQQ_FNS(sync);
 #undef CFQ_CFQQ_FNS
@@ -777,12 +773,10 @@ static void __cfq_set_active_queue(struct cfq_data *cfqd,
                cfqq->slice_end = 0;
                cfqq->slice_dispatch = 0;
 
-               cfq_clear_cfqq_must_dispatch(cfqq);
                cfq_clear_cfqq_wait_request(cfqq);
                cfq_clear_cfqq_must_alloc_slice(cfqq);
                cfq_clear_cfqq_fifo_expire(cfqq);
                cfq_mark_cfqq_slice_new(cfqq);
-               cfq_clear_cfqq_queue_new(cfqq);
 
                del_timer(&cfqd->idle_slice_timer);
        }
@@ -802,7 +796,6 @@ __cfq_slice_expired(struct cfq_data *cfqd, struct cfq_queue *cfqq,
        if (cfq_cfqq_wait_request(cfqq))
                del_timer(&cfqd->idle_slice_timer);
 
-       cfq_clear_cfqq_must_dispatch(cfqq);
        cfq_clear_cfqq_wait_request(cfqq);
 
        /*
@@ -931,7 +924,6 @@ static void cfq_arm_slice_timer(struct cfq_data *cfqd)
            (sample_valid(cic->ttime_samples) && cic->ttime_mean > 2))
                return;
 
-       cfq_mark_cfqq_must_dispatch(cfqq);
        cfq_mark_cfqq_wait_request(cfqq);
 
        /*
@@ -1520,7 +1512,6 @@ retry:
                cfqq->cfqd = cfqd;
 
                cfq_mark_cfqq_prio_changed(cfqq);
-               cfq_mark_cfqq_queue_new(cfqq);
 
                cfq_init_prio_data(cfqq, ioc);
 
@@ -1912,7 +1903,6 @@ cfq_rq_enqueued(struct cfq_data *cfqd, struct cfq_queue *cfqq,
                 * just now
                 */
                if (cfq_cfqq_wait_request(cfqq)) {
-                       cfq_mark_cfqq_must_dispatch(cfqq);
                        del_timer(&cfqd->idle_slice_timer);
                        blk_start_queueing(cfqd->queue);
                }
@@ -1924,7 +1914,6 @@ cfq_rq_enqueued(struct cfq_data *cfqd, struct cfq_queue *cfqq,
                 * this new queue is RT and the current one is BE
                 */
                cfq_preempt_queue(cfqd, cfqq);
-               cfq_mark_cfqq_must_dispatch(cfqq);
                blk_start_queueing(cfqd->queue);
        }
 }
@@ -2201,10 +2190,8 @@ static void cfq_idle_slice_timer(unsigned long data)
                /*
                 * not expired and it has a request pending, let it dispatch
                 */
-               if (!RB_EMPTY_ROOT(&cfqq->sort_list)) {
-                       cfq_mark_cfqq_must_dispatch(cfqq);
+               if (!RB_EMPTY_ROOT(&cfqq->sort_list))
                        goto out_kick;
-               }
        }
 expire:
        cfq_slice_expired(cfqd, timed_out);