target: Convert se_device statistics to atomic_long_t

This patch converts the handful of se_device statistics to type
atomic_long_t, instead of using se_device->stats_lock when
incrementing these values.

More importantly, go ahead and drop the spinlock usage within
transport_lookup_cmd_lun() fast-path code.

Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

1 files changed, 1 insertions, 3 deletions

diff --git a/drivers/target/target_core_tmr.c b/drivers/target/target_core_tmr.c
index 250009909d49..70c638f730af 100644
--- a/drivers/target/target_core_tmr.c
+++ b/drivers/target/target_core_tmr.c
@@ -386,9 +386,7 @@ int core_tmr_lun_reset(
                 pr_debug("LUN_RESET: SCSI-2 Released reservation\n");
         }
 
-        spin_lock_irq(&dev->stats_lock);
-        dev->num_resets++;
-        spin_unlock_irq(&dev->stats_lock);
+        atomic_long_inc(&dev->num_resets);
 
         pr_debug("LUN_RESET: %s for [%s] Complete\n",
                         (preempt_and_abort_list) ? "Preempt" : "TMR",