V4L/DVB (9817): v4l: add new tvp514x I2C video decoder driver

[safe/jmp/linux-2.6] / block / blk-core.c

diff --git a/block/blk-core.c b/block/blk-core.c
index 10e8a64..561e8a1 100644 (file)
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -28,9 +28,23 @@
 #include <linux/task_io_accounting_ops.h>
 #include <linux/blktrace_api.h>
 #include <linux/fault-inject.h>
+#include <trace/block.h>
 
 #include "blk.h"
 
+DEFINE_TRACE(block_plug);
+DEFINE_TRACE(block_unplug_io);
+DEFINE_TRACE(block_unplug_timer);
+DEFINE_TRACE(block_getrq);
+DEFINE_TRACE(block_sleeprq);
+DEFINE_TRACE(block_rq_requeue);
+DEFINE_TRACE(block_bio_backmerge);
+DEFINE_TRACE(block_bio_frontmerge);
+DEFINE_TRACE(block_bio_queue);
+DEFINE_TRACE(block_rq_complete);
+DEFINE_TRACE(block_remap);     /* Also used in drivers/md/dm.c */
+EXPORT_TRACEPOINT_SYMBOL_GPL(block_remap);
+
 static int __make_request(struct request_queue *q, struct bio *bio);
 
 /*
@@ -205,7 +219,7 @@ void blk_plug_device(struct request_queue *q)
 
        if (!queue_flag_test_and_set(QUEUE_FLAG_PLUGGED, q)) {
                mod_timer(&q->unplug_timer, jiffies + q->unplug_delay);
-               blk_add_trace_generic(q, NULL, 0, BLK_TA_PLUG);
+               trace_block_plug(q);
        }
 }
 EXPORT_SYMBOL(blk_plug_device);
@@ -292,9 +306,7 @@ void blk_unplug_work(struct work_struct *work)
        struct request_queue *q =
                container_of(work, struct request_queue, unplug_work);
 
-       blk_add_trace_pdu_int(q, BLK_TA_UNPLUG_IO, NULL,
-                               q->rq.count[READ] + q->rq.count[WRITE]);
-
+       trace_block_unplug_io(q);
        q->unplug_fn(q);
 }
 
@@ -302,9 +314,7 @@ void blk_unplug_timeout(unsigned long data)
 {
        struct request_queue *q = (struct request_queue *)data;
 
-       blk_add_trace_pdu_int(q, BLK_TA_UNPLUG_TIMER, NULL,
-                               q->rq.count[READ] + q->rq.count[WRITE]);
-
+       trace_block_unplug_timer(q);
        kblockd_schedule_work(q, &q->unplug_work);
 }
 
@@ -314,9 +324,7 @@ void blk_unplug(struct request_queue *q)
         * devices don't necessarily have an ->unplug_fn defined
         */
        if (q->unplug_fn) {
-               blk_add_trace_pdu_int(q, BLK_TA_UNPLUG_IO, NULL,
-                                       q->rq.count[READ] + q->rq.count[WRITE]);
-
+               trace_block_unplug_io(q);
                q->unplug_fn(q);
        }
 }
@@ -592,7 +600,7 @@ blk_init_queue_node(request_fn_proc *rfn, spinlock_t *lock, int node_id)
                                   1 << QUEUE_FLAG_STACKABLE);
        q->queue_lock           = lock;
 
-       blk_queue_segment_boundary(q, 0xffffffff);
+       blk_queue_segment_boundary(q, BLK_SEG_BOUNDARY_MASK);
 
        blk_queue_make_request(q, __make_request);
        blk_queue_max_segment_size(q, MAX_SEGMENT_SIZE);
@@ -822,7 +830,7 @@ rq_starved:
        if (ioc_batching(q, ioc))
                ioc->nr_batch_requests--;
 
-       blk_add_trace_generic(q, bio, rw, BLK_TA_GETRQ);
+       trace_block_getrq(q, bio, rw);
 out:
        return rq;
 }
@@ -848,7 +856,7 @@ static struct request *get_request_wait(struct request_queue *q, int rw_flags,
                prepare_to_wait_exclusive(&rl->wait[rw], &wait,
                                TASK_UNINTERRUPTIBLE);
 
-               blk_add_trace_generic(q, bio, rw, BLK_TA_SLEEPRQ);
+               trace_block_sleeprq(q, bio, rw);
 
                __generic_unplug_device(q);
                spin_unlock_irq(q->queue_lock);
@@ -928,7 +936,7 @@ void blk_requeue_request(struct request_queue *q, struct request *rq)
 {
        blk_delete_timer(rq);
        blk_clear_rq_complete(rq);
-       blk_add_trace_rq(q, rq, BLK_TA_REQUEUE);
+       trace_block_rq_requeue(q, rq);
 
        if (blk_rq_tagged(rq))
                blk_queue_end_tag(q, rq);
@@ -1167,7 +1175,7 @@ static int __make_request(struct request_queue *q, struct bio *bio)
                if (!ll_back_merge_fn(q, req, bio))
                        break;
 
-               blk_add_trace_bio(q, bio, BLK_TA_BACKMERGE);
+               trace_block_bio_backmerge(q, bio);
 
                req->biotail->bi_next = bio;
                req->biotail = bio;
@@ -1186,7 +1194,7 @@ static int __make_request(struct request_queue *q, struct bio *bio)
                if (!ll_front_merge_fn(q, req, bio))
                        break;
 
-               blk_add_trace_bio(q, bio, BLK_TA_FRONTMERGE);
+               trace_block_bio_frontmerge(q, bio);
 
                bio->bi_next = req->bio;
                req->bio = bio;
@@ -1269,7 +1277,7 @@ static inline void blk_partition_remap(struct bio *bio)
                bio->bi_sector += p->start_sect;
                bio->bi_bdev = bdev->bd_contains;
 
-               blk_add_trace_remap(bdev_get_queue(bio->bi_bdev), bio,
+               trace_block_remap(bdev_get_queue(bio->bi_bdev), bio,
                                    bdev->bd_dev, bio->bi_sector,
                                    bio->bi_sector - p->start_sect);
        }
@@ -1441,10 +1449,10 @@ end_io:
                        goto end_io;
 
                if (old_sector != -1)
-                       blk_add_trace_remap(q, bio, old_dev, bio->bi_sector,
+                       trace_block_remap(q, bio, old_dev, bio->bi_sector,
                                            old_sector);
 
-               blk_add_trace_bio(q, bio, BLK_TA_QUEUE);
+               trace_block_bio_queue(q, bio);
 
                old_sector = bio->bi_sector;
                old_dev = bio->bi_bdev->bd_dev;
@@ -1637,6 +1645,28 @@ int blk_insert_cloned_request(struct request_queue *q, struct request *rq)
 EXPORT_SYMBOL_GPL(blk_insert_cloned_request);
 
 /**
+ * blkdev_dequeue_request - dequeue request and start timeout timer
+ * @req: request to dequeue
+ *
+ * Dequeue @req and start timeout timer on it.  This hands off the
+ * request to the driver.
+ *
+ * Block internal functions which don't want to start timer should
+ * call elv_dequeue_request().
+ */
+void blkdev_dequeue_request(struct request *req)
+{
+       elv_dequeue_request(req->q, req);
+
+       /*
+        * We are now handing the request to the hardware, add the
+        * timeout handler.
+        */
+       blk_add_timer(req);
+}
+EXPORT_SYMBOL(blkdev_dequeue_request);
+
+/**
  * __end_that_request_first - end I/O on a request
  * @req:      the request being processed
  * @error:    %0 for success, < %0 for error
@@ -1656,7 +1686,7 @@ static int __end_that_request_first(struct request *req, int error,
        int total_bytes, bio_nbytes, next_idx = 0;
        struct bio *bio;
 
-       blk_add_trace_rq(req->q, req, BLK_TA_COMPLETE);
+       trace_block_rq_complete(req->q, req);
 
        /*
         * for a REQ_TYPE_BLOCK_PC request, we want to carry any eventual
@@ -1774,7 +1804,7 @@ static void end_that_request_last(struct request *req, int error)
                blk_queue_end_tag(req->q, req);
 
        if (blk_queued_rq(req))
-               blkdev_dequeue_request(req);
+               elv_dequeue_request(req->q, req);
 
        if (unlikely(laptop_mode) && blk_fs_request(req))
                laptop_io_completion();