On 2019/4/16 下午6:47, Stefan Hajnoczi wrote:
The vhost_scsi.ko code used several atomic variables at one point.
Later they were dropped or converted to regular ints protected by a
mutex.
The commit that made these changes left an unused smp_mb__after_atomic()
in vhost_scsi_set_endpoint(). It was previously used after incrementing
vhost_scsi->vhost_ref_cnt but this field has been dropped:
- atomic_inc(&vs->vhost_ref_cnt);
smp_mb__after_atomic_inc();
Reported-by: Andrea Parri <andrea.parri@xxxxxxxxxxxxxxxxxxxx>
Fixes: 101998f6fcd680 ("tcm_vhost: Post-merge review changes requested by MST")
Signed-off-by: Stefan Hajnoczi <stefanha@xxxxxxxxxx>
---
drivers/vhost/scsi.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c
index 618fb6461017..c090d177bd75 100644
--- a/drivers/vhost/scsi.c
+++ b/drivers/vhost/scsi.c
@@ -1443,7 +1443,6 @@ vhost_scsi_set_endpoint(struct vhost_scsi *vs,
tpg->tv_tpg_vhost_count++;
tpg->vhost_scsi = vs;
vs_tpg[tpg->tport_tpgt] = tpg;
- smp_mb__after_atomic();
match = true;
}
mutex_unlock(&tpg->tv_tpg_mutex);
Looks like Paolo has sent an identical patch before this one.
Thanks
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