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block: convert blkdev_issue_flush() to use empty barriers

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Then we can get rid of ->issue_flush_fn() and all the driver private
implementations of that.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe
2007-10-16 11:05:02 +02:00
parent bf2de6f5a4
commit fd5d806266
16 changed files with 36 additions and 329 deletions
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22
drivers/scsi/sd.c
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@@ -826,27 +826,6 @@ static int sd_sync_cache(struct scsi_disk *sdkp)
return 0;
}
static int sd_issue_flush(struct request_queue *q, struct gendisk *disk,
sector_t *error_sector)
{
int ret = 0;
struct scsi_device *sdp = q->queuedata;
struct scsi_disk *sdkp;
if (sdp->sdev_state != SDEV_RUNNING)
return -ENXIO;
sdkp = scsi_disk_get_from_dev(&sdp->sdev_gendev);
if (!sdkp)
return -ENODEV;
if (sdkp->WCE)
ret = sd_sync_cache(sdkp);
scsi_disk_put(sdkp);
return ret;
}
static void sd_prepare_flush(struct request_queue *q, struct request *rq)
{
memset(rq->cmd, 0, sizeof(rq->cmd));
@@ -1697,7 +1676,6 @@ static int sd_probe(struct device *dev)
sd_revalidate_disk(gd);
blk_queue_prep_rq(sdp->request_queue, sd_prep_fn);
blk_queue_issue_flush_fn(sdp->request_queue, sd_issue_flush);
gd->driverfs_dev = &sdp->sdev_gendev;
gd->flags = GENHD_FL_DRIVERFS;