libata: switch to using block layer tagging support

libata currently has a pretty dumb ATA_MAX_QUEUE loop for finding
a free tag to use. Instead of fixing that up, convert libata to
using block layer tagging - gets rid of code in libata, and is also
much faster.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 1 deletions

diff --git a/include/linux/libata.h b/include/linux/libata.h
index c261aa0584b1..507f53ef8038 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -695,7 +695,6 @@ struct ata_port {
         unsigned int            cbl;    /* cable type; ATA_CBL_xxx */
 
         struct ata_queued_cmd   qcmd[ATA_MAX_QUEUE];
-        unsigned long           qc_allocated;
         unsigned int            qc_active;
         int                     nr_active_links; /* #links with active qcs */