Re: [PATCH 7/8] block: remove req->special

[Christoph Hellwig <hch@xxxxxx>]

FYI, this needs the following fold, as Bart added another reference
to ->special past the branch point for my tree:

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 4fbb8310e268..a1e43e77ceef 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -1171,8 +1171,6 @@ static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *cmd)
 	if (ret != BLK_STS_OK)
 		return ret;
 
-	WARN_ON_ONCE(cmd != rq->special);
-
 	if (!scsi_device_online(sdp) || sdp->changed) {
 		scmd_printk(KERN_ERR, cmd, "device offline or changed\n");
 		return BLK_STS_IOERR;