[PATCH] update blk_execute_rq to take an at_head parameter
Original From: Mike Christie <michaelc@cs.wisc.edu>
Modified to split out block changes (this patch) and SCSI pieces.
Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/block/ll_rw_blk.c b/drivers/block/ll_rw_blk.c
index 874e46f..d260a2c 100644
--- a/drivers/block/ll_rw_blk.c
+++ b/drivers/block/ll_rw_blk.c
@@ -2269,13 +2269,14 @@
* @q: queue to insert the request in
* @bd_disk: matching gendisk
* @rq: request to insert
+ * @at_head: insert request at head or tail of queue
*
* Description:
* Insert a fully prepared request at the back of the io scheduler queue
* for execution.
*/
int blk_execute_rq(request_queue_t *q, struct gendisk *bd_disk,
- struct request *rq)
+ struct request *rq, int at_head)
{
DECLARE_COMPLETION(wait);
char sense[SCSI_SENSE_BUFFERSIZE];
@@ -2294,7 +2295,7 @@
}
rq->waiting = &wait;
- blk_execute_rq_nowait(q, bd_disk, rq, 0, blk_end_sync_rq);
+ blk_execute_rq_nowait(q, bd_disk, rq, at_head, blk_end_sync_rq);
wait_for_completion(&wait);
rq->waiting = NULL;
@@ -2361,7 +2362,7 @@
rq->data_len = 0;
rq->timeout = 60 * HZ;
- ret = blk_execute_rq(q, disk, rq);
+ ret = blk_execute_rq(q, disk, rq, 0);
if (ret && error_sector)
*error_sector = rq->sector;
diff --git a/drivers/block/scsi_ioctl.c b/drivers/block/scsi_ioctl.c
index 7717b76..abb2df2 100644
--- a/drivers/block/scsi_ioctl.c
+++ b/drivers/block/scsi_ioctl.c
@@ -308,7 +308,7 @@
* (if he doesn't check that is his problem).
* N.B. a non-zero SCSI status is _not_ necessarily an error.
*/
- blk_execute_rq(q, bd_disk, rq);
+ blk_execute_rq(q, bd_disk, rq, 0);
/* write to all output members */
hdr->status = 0xff & rq->errors;
@@ -420,7 +420,7 @@
rq->data_len = bytes;
rq->flags |= REQ_BLOCK_PC;
- blk_execute_rq(q, bd_disk, rq);
+ blk_execute_rq(q, bd_disk, rq, 0);
err = rq->errors & 0xff; /* only 8 bit SCSI status */
if (err) {
if (rq->sense_len && rq->sense) {
@@ -573,7 +573,7 @@
rq->cmd[0] = GPCMD_START_STOP_UNIT;
rq->cmd[4] = 0x02 + (close != 0);
rq->cmd_len = 6;
- err = blk_execute_rq(q, bd_disk, rq);
+ err = blk_execute_rq(q, bd_disk, rq, 0);
blk_put_request(rq);
break;
default:
diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index 6a7d926..1539603 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -2136,7 +2136,7 @@
if (rq->bio)
blk_queue_bounce(q, &rq->bio);
- if (blk_execute_rq(q, cdi->disk, rq)) {
+ if (blk_execute_rq(q, cdi->disk, rq, 0)) {
struct request_sense *s = rq->sense;
ret = -EIO;
cdi->last_sense = s->sense_key;
diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c
index 3302cd8..9176da7 100644
--- a/drivers/ide/ide-disk.c
+++ b/drivers/ide/ide-disk.c
@@ -750,7 +750,7 @@
idedisk_prepare_flush(q, rq);
- ret = blk_execute_rq(q, disk, rq);
+ ret = blk_execute_rq(q, disk, rq, 0);
/*
* if we failed and caller wants error offset, get it
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 0430ea3..a48dc12 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -562,8 +562,8 @@
extern int blk_rq_unmap_user(struct bio *, unsigned int);
extern int blk_rq_map_kern(request_queue_t *, struct request *, void *, unsigned int, unsigned int);
extern int blk_rq_map_user_iov(request_queue_t *, struct request *, struct sg_iovec *, int);
-extern int blk_execute_rq(request_queue_t *, struct gendisk *, struct request *);
-
+extern int blk_execute_rq(request_queue_t *, struct gendisk *,
+ struct request *, int);
static inline request_queue_t *bdev_get_queue(struct block_device *bdev)
{
return bdev->bd_disk->queue;