blktrace: port to tracepoints

This was a forward port of work done by Mathieu Desnoyers, I changed it to
encode the 'what' parameter on the tracepoint name, so that one can register
interest in specific events and not on classes of events to then check the
'what' parameter.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 4 insertions, 3 deletions

diff --git a/block/elevator.c b/block/elevator.c
index 9ac82dde99dd..530fcfe2ef07 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -33,6 +33,7 @@
 #include <linux/compiler.h>
 #include <linux/delay.h>
 #include <linux/blktrace_api.h>
+#include <trace/block.h>
 #include <linux/hash.h>
 #include <linux/uaccess.h>
 
@@ -586,7 +587,7 @@ void elv_insert(struct request_queue *q, struct request *rq, int where)
         unsigned ordseq;
         int unplug_it = 1;
 
-        blk_add_trace_rq(q, rq, BLK_TA_INSERT);
+        trace_block_rq_insert(q, rq);
 
         rq->q = q;
 
@@ -772,7 +773,7 @@ struct request *elv_next_request(struct request_queue *q)
                          * not be passed by new incoming requests
                          */
                         rq->cmd_flags |= REQ_STARTED;
-                        blk_add_trace_rq(q, rq, BLK_TA_ISSUE);
+                        trace_block_rq_issue(q, rq);
                 }
 
                 if (!q->boundary_rq || q->boundary_rq == rq) {
@@ -921,7 +922,7 @@ void elv_abort_queue(struct request_queue *q)
         while (!list_empty(&q->queue_head)) {
                 rq = list_entry_rq(q->queue_head.next);
                 rq->cmd_flags |= REQ_QUIET;
-                blk_add_trace_rq(q, rq, BLK_TA_ABORT);
+                trace_block_rq_abort(q, rq);
                 __blk_end_request(rq, -EIO, blk_rq_bytes(rq));
         }
 }