vbg_core_open_session
struct vbg_session *vbg_core_open_session(struct vbg_dev *gdev, u32 requestor);
session = vbg_core_open_session(gdev, vbg_misc_device_requestor(inode));
session = vbg_core_open_session(gdev, vbg_misc_device_requestor(inode) |