[SCSI] scsi_debug: simplify creation and destruction of driver attribute files
Instead of repeatedly calling driver_create_file() to create driver attribute files, This achieves the same thing by constructing an array of driver_attribute and setting it to bus_type->drv_groups. This change simplifies both creation and destruction of the attribute files, and also removes sparse warning caused by driver_attributes which are unnecessarily declared as global. Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com> Acked-by: NDouglas Gilbert <dgilbert@interlog.com> Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>
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