mnt_has_parent

函数名称：mnt_has_parent

函数原型：static inline int mnt_has_parent(struct mount *mnt)

返回类型：int

参数：

类型	参数	名称
struct mount *	mnt

**调用者**
名称	描述
disconnect_mount
umount_tree	mount_lock must be held* namespace_sem must be held for write
do_move_mount
is_path_reachable	Return true if path is reachable from root* namespace_sem or mount_lock is held
SYSCALL_DEFINE2	pivot_root Semantics:* Moves the root file system of the current process to the directory put_old,* makes new_root as the new root file system of the current process, and sets* root/cwd of all processes which had them on the current root to new_root

函数逻辑报告