Revert "block: add missing block_bio_complete() tracepoint"

This reverts commit 3a366e614d0837d9fc23f78cdb1a1186ebc3387f.

Wanlong Gao reports that it causes a kernel panic on his machine several
minutes after boot. Reverting it removes the panic.

Jens says:
 "It's not quite clear why that is yet, so I think we should just revert
  the commit for 3.9 final (which I'm assuming is pretty close).

  The wifi is crap at the LSF hotel, so sending this email instead of
  queueing up a revert and pull request."

Reported-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Requested-by: Jens Axboe <axboe@kernel.dk>
Cc: Tejun Heo <tj@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 10 insertions, 1 deletions

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 24909eb13fec..f4e87bfc7567 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -184,6 +184,8 @@ static void return_io(struct bio *return_bi)
                 return_bi = bi->bi_next;
                 bi->bi_next = NULL;
                 bi->bi_size = 0;
+                trace_block_bio_complete(bdev_get_queue(bi->bi_bdev),
+                                         bi, 0);
                 bio_endio(bi, 0);
                 bi = return_bi;
         }
@@ -3914,6 +3916,8 @@ static void raid5_align_endio(struct bio *bi, int error)
         rdev_dec_pending(rdev, conf->mddev);
 
         if (!error && uptodate) {
+                trace_block_bio_complete(bdev_get_queue(raid_bi->bi_bdev),
+                                         raid_bi, 0);
                 bio_endio(raid_bi, 0);
                 if (atomic_dec_and_test(&conf->active_aligned_reads))
                         wake_up(&conf->wait_for_stripe);
@@ -4382,6 +4386,8 @@ static void make_request(struct mddev *mddev, struct bio * bi)
                 if ( rw == WRITE )
                         md_write_end(mddev);
 
+                trace_block_bio_complete(bdev_get_queue(bi->bi_bdev),
+                                         bi, 0);
                 bio_endio(bi, 0);
         }
 }
@@ -4758,8 +4764,11 @@ static int  retry_aligned_read(struct r5conf *conf, struct bio *raid_bio)
                 handled++;
         }
         remaining = raid5_dec_bi_active_stripes(raid_bio);
-        if (remaining == 0)
+        if (remaining == 0) {
+                trace_block_bio_complete(bdev_get_queue(raid_bio->bi_bdev),
+                                         raid_bio, 0);
                 bio_endio(raid_bio, 0);
+        }
         if (atomic_dec_and_test(&conf->active_aligned_reads))
                 wake_up(&conf->wait_for_stripe);
         return handled;