Man page 9 : disk_get_part

disk_get_part - get partition

struct hd_struct * disk_get_part(struct gendisk *  disk , int  partno );

disk
    disk to look partition from

partno
    partition number

Look for partition partno from disk. If found, increment reference count and return it.

DonAqt care.

Pointer to the found partition on success, NULL if not found.