h63xx: tsc2101 alsa sound support

[linux-2.6-omap-h63xx.git] / block / elevator.c

diff --git a/block/elevator.c b/block/elevator.c
index dbbea73a8b10b513bd335f42129d38838d551794..24b702d649a953977cafb7125ca1b81d73947cc3 100644 (file)
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -168,10 +168,12 @@ int elevator_init(request_queue_t *q, char *name)
        if (name && !(e = elevator_get(name)))
                return -EINVAL;
 
-       if (!e && !(e = elevator_get(chosen_elevator))) {
-               e = elevator_get(CONFIG_DEFAULT_IOSCHED);
-               if (*chosen_elevator)
-                       printk("I/O scheduler %s not found\n", chosen_elevator);
+       if (!e && *chosen_elevator && !(e = elevator_get(chosen_elevator)))
+               printk("I/O scheduler %s not found\n", chosen_elevator);
+
+       if (!e && !(e = elevator_get(CONFIG_DEFAULT_IOSCHED))) {
+               printk("Default I/O scheduler not found, using no-op\n");
+               e = elevator_get("noop");
        }
 
        eq = kmalloc(sizeof(struct elevator_queue), GFP_KERNEL);
@@ -291,7 +293,7 @@ void elv_requeue_request(request_queue_t *q, struct request *rq)
 
        rq->flags &= ~REQ_STARTED;
 
-       __elv_add_request(q, rq, ELEVATOR_INSERT_REQUEUE, 0);
+       elv_insert(q, rq, ELEVATOR_INSERT_REQUEUE);
 }
 
 static void elv_drain_elevator(request_queue_t *q)
@@ -308,40 +310,11 @@ static void elv_drain_elevator(request_queue_t *q)
        }
 }
 
-void __elv_add_request(request_queue_t *q, struct request *rq, int where,
-                      int plug)
+void elv_insert(request_queue_t *q, struct request *rq, int where)
 {
        struct list_head *pos;
        unsigned ordseq;
 
-       if (q->ordcolor)
-               rq->flags |= REQ_ORDERED_COLOR;
-
-       if (rq->flags & (REQ_SOFTBARRIER | REQ_HARDBARRIER)) {
-               /*
-                * toggle ordered color
-                */
-               q->ordcolor ^= 1;
-
-               /*
-                * barriers implicitly indicate back insertion
-                */
-               if (where == ELEVATOR_INSERT_SORT)
-                       where = ELEVATOR_INSERT_BACK;
-
-               /*
-                * this request is scheduling boundary, update end_sector
-                */
-               if (blk_fs_request(rq)) {
-                       q->end_sector = rq_end_sector(rq);
-                       q->boundary_rq = rq;
-               }
-       } else if (!(rq->flags & REQ_ELVPRIV) && where == ELEVATOR_INSERT_SORT)
-               where = ELEVATOR_INSERT_BACK;
-
-       if (plug)
-               blk_plug_device(q);
-
        rq->q = q;
 
        switch (where) {
@@ -422,6 +395,42 @@ void __elv_add_request(request_queue_t *q, struct request *rq, int where,
        }
 }
 
+void __elv_add_request(request_queue_t *q, struct request *rq, int where,
+                      int plug)
+{
+       if (q->ordcolor)
+               rq->flags |= REQ_ORDERED_COLOR;
+
+       if (rq->flags & (REQ_SOFTBARRIER | REQ_HARDBARRIER)) {
+               /*
+                * toggle ordered color
+                */
+               if (blk_barrier_rq(rq))
+                       q->ordcolor ^= 1;
+
+               /*
+                * barriers implicitly indicate back insertion
+                */
+               if (where == ELEVATOR_INSERT_SORT)
+                       where = ELEVATOR_INSERT_BACK;
+
+               /*
+                * this request is scheduling boundary, update
+                * end_sector
+                */
+               if (blk_fs_request(rq)) {
+                       q->end_sector = rq_end_sector(rq);
+                       q->boundary_rq = rq;
+               }
+       } else if (!(rq->flags & REQ_ELVPRIV) && where == ELEVATOR_INSERT_SORT)
+               where = ELEVATOR_INSERT_BACK;
+
+       if (plug)
+               blk_plug_device(q);
+
+       elv_insert(q, rq, where);
+}
+
 void elv_add_request(request_queue_t *q, struct request *rq, int where,
                     int plug)
 {