blkdebug: remove sync i/o events

These are unused, except (by mistake more or less) in QED.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

block.h

diff --git a/block.h b/block.h
index d135652..42e30d6 100644
--- a/block.h
+++ b/block.h
@@ -395,9 +395,7 @@
     BLKDBG_L2_ALLOC_COW_READ,
     BLKDBG_L2_ALLOC_WRITE,
 
-    BLKDBG_READ,
     BLKDBG_READ_AIO,
-    BLKDBG_READ_BACKING,
     BLKDBG_READ_BACKING_AIO,
     BLKDBG_READ_COMPRESSED,
 

block/blkdebug.c

diff --git a/block/blkdebug.c b/block/blkdebug.c
index e56e37d..1eff940 100644
--- a/block/blkdebug.c
+++ b/block/blkdebug.c
@@ -147,9 +147,7 @@
     [BLKDBG_L2_ALLOC_COW_READ]              = "l2_alloc.cow_read",
     [BLKDBG_L2_ALLOC_WRITE]                 = "l2_alloc.write",
 
-    [BLKDBG_READ]                           = "read",
     [BLKDBG_READ_AIO]                       = "read_aio",
-    [BLKDBG_READ_BACKING]                   = "read_backing",
     [BLKDBG_READ_BACKING_AIO]               = "read_backing_aio",
     [BLKDBG_READ_COMPRESSED]                = "read_compressed",
 

block/qed.c

diff --git a/block/qed.c b/block/qed.c
index ab59724..dd2832a 100644
--- a/block/qed.c
+++ b/block/qed.c
@@ -748,7 +748,7 @@
     /* If the read straddles the end of the backing file, shorten it */
     size = MIN((uint64_t)backing_length - pos, qiov->size);
 
-    BLKDBG_EVENT(s->bs->file, BLKDBG_READ_BACKING);
+    BLKDBG_EVENT(s->bs->file, BLKDBG_READ_BACKING_AIO);
     bdrv_aio_readv(s->bs->backing_hd, pos / BDRV_SECTOR_SIZE,
                    qiov, size / BDRV_SECTOR_SIZE, cb, opaque);
 }