if (atomic_read(&mnt->mnt_count) > 2) return -EBUSY; return 0; 
int ret = 0; spin_lock(&vfsmount_lock); if (propagate_mount_busy(mnt, 2)) ret = -EBUSY; spin_unlock(&vfsmount_lock); return ret; 
int may_umount(struct vfsmount *mnt){	if (atomic_read(&mnt->mnt_count) > 2)		return -EBUSY;	return 0;}
10457	/local/tlutelli/issta_data/temp/c/2005_temp/2005/10457/a05964f3917c7c55368c229d7985f8e7c9977e97/namespace.c/clean/fs/namespace.c