disk_expand_part_tbl — expand disk->part_tbl
|struct gendisk * disk,|
struct gendisk * disk
disk to expand part_tbl for
expand such that this partno can fit in
Expand disk->part_tbl such that
partno can fit in. disk->part_tbl
uses RCU to allow unlocked dereferencing for stats and other stuff.
LOCKING: Matching bd_mutex locked, might sleep.