user_path_mountpoint

函数名称：ser_path_mountpoint_at - lookup a path from userland in order to umount it*@dfd: directory file descriptor*@name: pathname from userland*@flags: lookup flags*@path: pointer to container to hold result* A umount is a special case for path walking

函数原型：int user_path_mountpoint_at(int dfd, const char __user *name, unsigned int flags, struct path *path)

返回类型：int

参数：

类型	参数	名称
int	dfd
const char __user *	name
unsigned int	flags
struct path *	path

**调用者**
名称	描述
ksys_umount	Now umount can handle mount points as well as block devices.* This is important for filesystems which use unnamed block devices.* We now support a flag for forced unmount like the other 'big iron'* unixes

函数逻辑报告