318 	if (mnt == current->fs->rootmnt && !(flags & MNT_DETACH)) {  in do_umount()
754 	struct fs_struct *fs = tsk->fs;  in copy_namespace()  local
786 	if (fs) {  in copy_namespace()
788 		write_lock(&fs->lock);  in copy_namespace()
793 			if (p == fs->rootmnt) {  in copy_namespace()
795 				fs->rootmnt = mntget(q);  in copy_namespace()
797 			if (p == fs->pwdmnt) {  in copy_namespace()
799 				fs->pwdmnt = mntget(q);  in copy_namespace()
801 			if (p == fs->altrootmnt) {  in copy_namespace()
803 				fs->altrootmnt = mntget(q);  in copy_namespace()
808 		write_unlock(&fs->lock);  in copy_namespace()
873 	struct fs_struct *fs;  in chroot_fs_refs()  local
878 		fs = p->fs;  in chroot_fs_refs()
879 		if (fs) {  in chroot_fs_refs()
880 			atomic_inc(&fs->count);  in chroot_fs_refs()
882 			if (fs->root==old_nd->dentry&&fs->rootmnt==old_nd->mnt)  in chroot_fs_refs()
883 				set_fs_root(fs, new_nd->mnt, new_nd->dentry);  in chroot_fs_refs()
884 			if (fs->pwd==old_nd->dentry&&fs->pwdmnt==old_nd->mnt)  in chroot_fs_refs()
885 				set_fs_pwd(fs, new_nd->mnt, new_nd->dentry);  in chroot_fs_refs()
886 			put_fs_struct(fs);  in chroot_fs_refs()
928 	read_lock(&current->fs->lock);  in sys_pivot_root()
929 	user_nd.mnt = mntget(current->fs->rootmnt);  in sys_pivot_root()
930 	user_nd.dentry = dget(current->fs->root);  in sys_pivot_root()
931 	read_unlock(&current->fs->lock);  in sys_pivot_root()
1016 	set_fs_pwd(current->fs, namespace->root, namespace->root->mnt_root);  in init_mount_tree()
1017 	set_fs_root(current->fs, namespace->root, namespace->root->mnt_root);  in init_mount_tree()