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, 2 insertions, 1 deletions

diff --git a/fs/bio.c b/fs/bio.c
index 77a55bcceedb..060859c69092 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -26,6 +26,7 @@
 #include <linux/mempool.h>
 #include <linux/workqueue.h>
 #include <linux/blktrace_api.h>
+#include <trace/block.h>
 #include <scsi/sg.h>            /* for struct sg_iovec */
 
 static struct kmem_cache *bio_slab __read_mostly;
@@ -1263,7 +1264,7 @@ struct bio_pair *bio_split(struct bio *bi, int first_sectors)
         if (!bp)
                 return bp;
 
-        blk_add_trace_pdu_int(bdev_get_queue(bi->bi_bdev), BLK_TA_SPLIT, bi,
+        trace_block_split(bdev_get_queue(bi->bi_bdev), bi,
                                 bi->bi_sector + first_sectors);
 
         BUG_ON(bi->bi_vcnt != 1);