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    block: allow disk to have extended device number · 3e1a7ff8
    Tejun Heo 提交于
    Now that disk and partition handlings are mostly unified, it's easy to
    allow disk to have extended device number.  This patch makes
    add_disk() use extended device number if disk->minors is zero.  Both
    sd and ide-disk are updated to use this.
    
    * sd_format_disk_name() is implemented which can generically determine
      the drive name.  This removes disk number restriction stemming from
      limited device names.
    
    * If sd index goes over SD_MAX_DISKS (which can be increased now BTW),
      sd simply doesn't initialize minors letting block layer choose
      extended device number.
    
    * If CONFIG_DEBUG_EXT_DEVT is set, both sd and ide-disk always set
      minors to 0 and use extended device numbers.
    Signed-off-by: NTejun Heo <tj@kernel.org>
    Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
    3e1a7ff8
genhd.h 17.3 KB