
This eliminates a race condition between the disk driver calling sys_statectl(SYS_STATE_CLEAR_IPC_REFS) as part of driver_announce(), and the root MFS calling sendrec(DEV_OPEN) on the disk driver.
This eliminates a race condition between the disk driver calling sys_statectl(SYS_STATE_CLEAR_IPC_REFS) as part of driver_announce(), and the root MFS calling sendrec(DEV_OPEN) on the disk driver.