block: Rename blk_queue_max_sectors to blk_queue_max_hw_sectors

The block layer calling convention is blk_queue_<limit name>.
blk_queue_max_sectors predates this practice, leading to some confusion.
Rename the function to appropriately reflect that its intended use is to
set max_hw_sectors.

Also introduce a temporary wrapper for backwards compability.  This can
be removed after the merge window is closed.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

arch/um/drivers/ubd_kern.c

@@ -747,7 +747,7 @@ static int ubd_open_dev(struct ubd *ubd_dev)
 	ubd_dev->fd = fd;
 
 	if(ubd_dev->cow.file != NULL){
-		blk_queue_max_sectors(ubd_dev->queue, 8 * sizeof(long));
+		blk_queue_max_hw_sectors(ubd_dev->queue, 8 * sizeof(long));
 
 		err = -ENOMEM;
 		ubd_dev->cow.bitmap = vmalloc(ubd_dev->cow.bitmap_len);

block/blk-settings.c

@@ -154,7 +154,7 @@ void blk_queue_make_request(struct request_queue *q, make_request_fn *mfn)
 	q->unplug_timer.data = (unsigned long)q;
 
 	blk_set_default_limits(&q->limits);
-	blk_queue_max_sectors(q, BLK_SAFE_MAX_SECTORS);
+	blk_queue_max_hw_sectors(q, BLK_SAFE_MAX_SECTORS);
 
 	/*
 	 * If the caller didn't supply a lock, fall back to our embedded
@@ -210,7 +210,7 @@ void blk_queue_bounce_limit(struct request_queue *q, u64 dma_mask)
 EXPORT_SYMBOL(blk_queue_bounce_limit);
 
 /**
- * blk_queue_max_sectors - set max sectors for a request for this queue
+ * blk_queue_max_hw_sectors - set max sectors for a request for this queue
  * @q:  the request queue for the device
  * @max_hw_sectors:  max hardware sectors in the usual 512b unit
  *
@@ -225,7 +225,7 @@ EXPORT_SYMBOL(blk_queue_bounce_limit);
  *    per-device basis in /sys/block/<device>/queue/max_sectors_kb.
  *    The soft limit can not exceed max_hw_sectors.
  **/
-void blk_queue_max_sectors(struct request_queue *q, unsigned int max_hw_sectors)
+void blk_queue_max_hw_sectors(struct request_queue *q, unsigned int max_hw_sectors)
 {
 	if ((max_hw_sectors << 9) < PAGE_CACHE_SIZE) {
 		max_hw_sectors = 1 << (PAGE_CACHE_SHIFT - 9);
@@ -237,7 +237,7 @@ void blk_queue_max_sectors(struct request_queue *q, unsigned int max_hw_sectors)
 	q->limits.max_sectors = min_t(unsigned int, max_hw_sectors,
 				      BLK_DEF_MAX_SECTORS);
 }
-EXPORT_SYMBOL(blk_queue_max_sectors);
+EXPORT_SYMBOL(blk_queue_max_hw_sectors);
 
 /**
  * blk_queue_max_discard_sectors - set max sectors for a single discard

drivers/ata/libata-scsi.c

@@ -1097,7 +1097,7 @@ static int ata_scsi_dev_config(struct scsi_device *sdev,
 		dev->flags |= ATA_DFLAG_NO_UNLOAD;
 
 	/* configure max sectors */
-	blk_queue_max_sectors(sdev->request_queue, dev->max_sectors);
+	blk_queue_max_hw_sectors(sdev->request_queue, dev->max_sectors);
 
 	if (dev->class == ATA_DEV_ATAPI) {
 		struct request_queue *q = sdev->request_queue;

drivers/block/DAC960.c

@@ -2535,7 +2535,7 @@ static bool DAC960_RegisterBlockDevice(DAC960_Controller_T *Controller)
   	RequestQueue->queuedata = Controller;
   	blk_queue_max_hw_segments(RequestQueue, Controller->DriverScatterGatherLimit);
 	blk_queue_max_phys_segments(RequestQueue, Controller->DriverScatterGatherLimit);
-	blk_queue_max_sectors(RequestQueue, Controller->MaxBlocksPerCommand);
+	blk_queue_max_hw_sectors(RequestQueue, Controller->MaxBlocksPerCommand);
 	disk->queue = RequestQueue;
 	sprintf(disk->disk_name, "rd/c%dd%d", Controller->ControllerNumber, n);
 	disk->major = MajorNumber;

drivers/block/brd.c

@@ -434,7 +434,7 @@ static struct brd_device *brd_alloc(int i)
 		goto out_free_dev;
 	blk_queue_make_request(brd->brd_queue, brd_make_request);
 	blk_queue_ordered(brd->brd_queue, QUEUE_ORDERED_TAG, NULL);
-	blk_queue_max_sectors(brd->brd_queue, 1024);
+	blk_queue_max_hw_sectors(brd->brd_queue, 1024);
 	blk_queue_bounce_limit(brd->brd_queue, BLK_BOUNCE_ANY);
 
 	disk = brd->brd_disk = alloc_disk(1 << part_shift);

drivers/block/cciss.c

@@ -1802,7 +1802,7 @@ static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
 	/* This is a limit in the driver and could be eliminated. */
 	blk_queue_max_phys_segments(disk->queue, h->maxsgentries);
 
-	blk_queue_max_sectors(disk->queue, h->cciss_max_sectors);
+	blk_queue_max_hw_sectors(disk->queue, h->cciss_max_sectors);
 
 	blk_queue_softirq_done(disk->queue, cciss_softirq_done);
 

drivers/block/drbd/drbd_nl.c

@@ -709,7 +709,7 @@ void drbd_setup_queue_param(struct drbd_conf *mdev, unsigned int max_seg_s) __mu
 
 	max_seg_s = min(queue_max_sectors(b) * queue_logical_block_size(b), max_seg_s);
 
-	blk_queue_max_sectors(q, max_seg_s >> 9);
+	blk_queue_max_hw_sectors(q, max_seg_s >> 9);
 	blk_queue_max_phys_segments(q, max_segments ? max_segments : MAX_PHYS_SEGMENTS);
 	blk_queue_max_hw_segments(q, max_segments ? max_segments : MAX_HW_SEGMENTS);
 	blk_queue_max_segment_size(q, max_seg_s);

drivers/block/floppy.c

@@ -4234,7 +4234,7 @@ static int __init floppy_init(void)
 		err = -ENOMEM;
 		goto out_unreg_driver;
 	}
-	blk_queue_max_sectors(floppy_queue, 64);
+	blk_queue_max_hw_sectors(floppy_queue, 64);
 
 	blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE,
 			    floppy_find, NULL, NULL);

drivers/block/hd.c

@@ -719,7 +719,7 @@ static int __init hd_init(void)
 		return -ENOMEM;
 	}
 
-	blk_queue_max_sectors(hd_queue, 255);
+	blk_queue_max_hw_sectors(hd_queue, 255);
 	init_timer(&device_timer);
 	device_timer.function = hd_times_out;
 	blk_queue_logical_block_size(hd_queue, 512);

drivers/block/mg_disk.c

@@ -980,7 +980,7 @@ static int mg_probe(struct platform_device *plat_dev)
 				__func__, __LINE__);
 		goto probe_err_6;
 	}
-	blk_queue_max_sectors(host->breq, MG_MAX_SECTS);
+	blk_queue_max_hw_sectors(host->breq, MG_MAX_SECTS);
 	blk_queue_logical_block_size(host->breq, MG_SECTOR_SIZE);
 
 	init_timer(&host->timer);

drivers/block/paride/pd.c

@@ -906,7 +906,7 @@ static int __init pd_init(void)
 	if (!pd_queue)
 		goto out1;
 
-	blk_queue_max_sectors(pd_queue, cluster);
+	blk_queue_max_hw_sectors(pd_queue, cluster);
 
 	if (register_blkdev(major, name))
 		goto out2;

drivers/block/pktcdvd.c

@@ -2312,7 +2312,7 @@ static int pkt_open_dev(struct pktcdvd_device *pd, fmode_t write)
 		 * even if the size is a multiple of the packet size.
 		 */
 		spin_lock_irq(q->queue_lock);
-		blk_queue_max_sectors(q, pd->settings.size);
+		blk_queue_max_hw_sectors(q, pd->settings.size);
 		spin_unlock_irq(q->queue_lock);
 		set_bit(PACKET_WRITABLE, &pd->flags);
 	} else {
@@ -2613,7 +2613,7 @@ static void pkt_init_queue(struct pktcdvd_device *pd)
 
 	blk_queue_make_request(q, pkt_make_request);
 	blk_queue_logical_block_size(q, CD_FRAMESIZE);
-	blk_queue_max_sectors(q, PACKET_MAX_SECTORS);
+	blk_queue_max_hw_sectors(q, PACKET_MAX_SECTORS);
 	blk_queue_merge_bvec(q, pkt_merge_bvec);
 	q->queuedata = pd;
 }

drivers/block/ps3disk.c

@@ -474,7 +474,7 @@ static int __devinit ps3disk_probe(struct ps3_system_bus_device *_dev)
 
 	blk_queue_bounce_limit(queue, BLK_BOUNCE_HIGH);
 
-	blk_queue_max_sectors(queue, dev->bounce_size >> 9);
+	blk_queue_max_hw_sectors(queue, dev->bounce_size >> 9);
 	blk_queue_segment_boundary(queue, -1UL);
 	blk_queue_dma_alignment(queue, dev->blk_size-1);
 	blk_queue_logical_block_size(queue, dev->blk_size);

drivers/block/ps3vram.c

@@ -754,7 +754,7 @@ static int __devinit ps3vram_probe(struct ps3_system_bus_device *dev)
 	blk_queue_max_phys_segments(queue, MAX_PHYS_SEGMENTS);
 	blk_queue_max_hw_segments(queue, MAX_HW_SEGMENTS);
 	blk_queue_max_segment_size(queue, BLK_MAX_SEGMENT_SIZE);
-	blk_queue_max_sectors(queue, BLK_SAFE_MAX_SECTORS);
+	blk_queue_max_hw_sectors(queue, BLK_SAFE_MAX_SECTORS);
 
 	gendisk = alloc_disk(1);
 	if (!gendisk) {

drivers/block/sunvdc.c

@@ -693,7 +693,7 @@ static int probe_disk(struct vdc_port *port)
 
 	blk_queue_max_hw_segments(q, port->ring_cookies);
 	blk_queue_max_phys_segments(q, port->ring_cookies);
-	blk_queue_max_sectors(q, port->max_xfer_size);
+	blk_queue_max_hw_sectors(q, port->max_xfer_size);
 	g->major = vdc_major;
 	g->first_minor = port->vio.vdev->dev_no << PARTITION_SHIFT;
 	strcpy(g->disk_name, port->disk_name);

drivers/block/ub.c

@@ -2323,7 +2323,7 @@ static int ub_probe_lun(struct ub_dev *sc, int lnum)
 	blk_queue_max_hw_segments(q, UB_MAX_REQ_SG);
 	blk_queue_max_phys_segments(q, UB_MAX_REQ_SG);
 	blk_queue_segment_boundary(q, 0xffffffff);	/* Dubious. */
-	blk_queue_max_sectors(q, UB_MAX_SECTORS);
+	blk_queue_max_hw_sectors(q, UB_MAX_SECTORS);
 	blk_queue_logical_block_size(q, lun->capacity.bsize);
 
 	lun->disk = disk;

drivers/block/viodasd.c

@@ -473,7 +473,7 @@ retry:
 	d->disk = g;
 	blk_queue_max_hw_segments(q, VIOMAXBLOCKDMA);
 	blk_queue_max_phys_segments(q, VIOMAXBLOCKDMA);
-	blk_queue_max_sectors(q, VIODASD_MAXSECTORS);
+	blk_queue_max_hw_sectors(q, VIODASD_MAXSECTORS);
 	g->major = VIODASD_MAJOR;
 	g->first_minor = dev_no << PARTITION_SHIFT;
 	if (dev_no >= 26)

drivers/block/xd.c

@@ -242,7 +242,7 @@ static int __init xd_init(void)
 	}
 
 	/* xd_maxsectors depends on controller - so set after detection */
-	blk_queue_max_sectors(xd_queue, xd_maxsectors);
+	blk_queue_max_hw_sectors(xd_queue, xd_maxsectors);
 
 	for (i = 0; i < xd_drives; i++)
 		add_disk(xd_gendisk[i]);

drivers/block/xen-blkfront.c

@@ -346,7 +346,7 @@ static int xlvbd_init_blk_queue(struct gendisk *gd, u16 sector_size)
 
 	/* Hard sector size and max sectors impersonate the equiv. hardware. */
 	blk_queue_logical_block_size(rq, sector_size);
-	blk_queue_max_sectors(rq, 512);
+	blk_queue_max_hw_sectors(rq, 512);
 
 	/* Each segment in a request is up to an aligned page in size. */
 	blk_queue_segment_boundary(rq, PAGE_SIZE - 1);

drivers/cdrom/viocd.c

@@ -618,7 +618,7 @@ static int viocd_probe(struct vio_dev *vdev, const struct vio_device_id *id)
 			sizeof(gendisk->disk_name));
 	blk_queue_max_hw_segments(q, 1);
 	blk_queue_max_phys_segments(q, 1);
-	blk_queue_max_sectors(q, 4096 / 512);
+	blk_queue_max_hw_sectors(q, 4096 / 512);
 	gendisk->queue = q;
 	gendisk->fops = &viocd_fops;
 	gendisk->flags = GENHD_FL_CD|GENHD_FL_REMOVABLE;