Symbol: DM_DEV_WAIT_CMD
drivers/md/dm-ioctl.c
1870
{DM_DEV_WAIT_CMD, 0, dev_wait},
include/uapi/linux/dm-ioctl.h
276
#define DM_DEV_WAIT _IOWR(DM_IOCTL, DM_DEV_WAIT_CMD, struct dm_ioctl)