block: move disk_name and related helpers out of partition-generic.c
Thes functions aren't really related to partition support, so move them
to a more suitable place.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/block/genhd.c b/block/genhd.c
index c5d20a4..2484348 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -69,6 +69,27 @@ void set_capacity_revalidate_and_notify(struct gendisk *disk, sector_t size,
EXPORT_SYMBOL_GPL(set_capacity_revalidate_and_notify);
+/*
+ * Format the device name of the indicated disk into the supplied buffer and
+ * return a pointer to that same buffer for convenience.
+ */
+char *disk_name(struct gendisk *hd, int partno, char *buf)
+{
+ if (!partno)
+ snprintf(buf, BDEVNAME_SIZE, "%s", hd->disk_name);
+ else if (isdigit(hd->disk_name[strlen(hd->disk_name)-1]))
+ snprintf(buf, BDEVNAME_SIZE, "%sp%d", hd->disk_name, partno);
+ else
+ snprintf(buf, BDEVNAME_SIZE, "%s%d", hd->disk_name, partno);
+
+ return buf;
+}
+
+const char *bdevname(struct block_device *bdev, char *buf)
+{
+ return disk_name(bdev->bd_disk, bdev->bd_part->partno, buf);
+}
+EXPORT_SYMBOL(bdevname);
void part_inc_in_flight(struct request_queue *q, struct hd_struct *part, int rw)
{