drop vmerge accounting

Remove hw_segments field from struct bio and struct request. Without virtual
merge accounting they have no purpose.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 0 insertions, 7 deletions

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 490ce458b031..1adb03827bd3 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -189,13 +189,6 @@ struct request {
          */
         unsigned short nr_phys_segments;
 
-        /* Number of scatter-gather addr+len pairs after
-         * physical and DMA remapping hardware coalescing is performed.
-         * This is the number of scatter-gather entries the driver
-         * will actually have to deal with after DMA mapping is done.
-         */
-        unsigned short nr_hw_segments;
-
         unsigned short ioprio;
 
         void *special;