xfs_buf_get_uncached
error = xfs_buf_get_uncached(mp->m_ddev_targp, numblks, &bp);
error = xfs_buf_get_uncached(target, numblks, &bp);
int xfs_buf_get_uncached(struct xfs_buftarg *target, size_t numblks,
error = xfs_buf_get_uncached(mp->m_rtdev_targp, XFS_FSB_TO_BB(mp, 1),
DEFINE_BUF_EVENT(xfs_buf_get_uncached);