MNTK_THR_SYNC
if (mp->mnt_kern_flag & MNTK_THR_SYNC) {
KKASSERT(mp->mnt_kern_flag & MNTK_THR_SYNC);
mp->mnt_kern_flag |= MNTK_THR_SYNC;
mp->mnt_kern_flag |= MNTK_THR_SYNC; /* new vsyncscan semantics */
mp->mnt_kern_flag |= MNTK_THR_SYNC; /* new vsyncscan semantics */
mp->mnt_kern_flag |= MNTK_THR_SYNC; /* new vsyncscan semantics */
mp->mnt_kern_flag |= MNTK_THR_SYNC; /* new vsyncscan semantics */
(vp->v_mount->mnt_kern_flag & MNTK_THR_SYNC)) {
mp->mnt_kern_flag |= MNTK_THR_SYNC; /* new vsyncscan semantics */