_kern_unmount
extern status_t _kern_unmount(const char *path, uint32 flags);
status_t status = _kern_unmount(bsdVolume->mnt_stat.f_mntonname, B_FORCE_UNMOUNT);
return _kern_unmount(path, flags);
fssh_status_t error = _kern_unmount(kMountPoint, 0);
fssh_status_t error = _kern_unmount(kMountPoint, 0);
fssh_status_t _kern_unmount(const char *path, uint32_t flags);