我的 Buildroot 为 Zynq 板生成的 Linux 和 rootfs 映像存在问题。问题是随机非阻塞池在启动后大约 2 分钟生成，就在我收到如下内核消息之后：
random: nonblocking pool is initialized
这很烦人，因为它阻止了 TCF 代理启动，我必须等待远程运行任何东西，或者在前 2 分钟内使用 scp。
我正在使用 Buildroot 2017.08。我能用它做些什么吗？
我有CP2105的板子。它是一个 USB 端口上具有两个 uart 接口的 USB 到串行桥接器。我已经阅读了一些指南和 UDEV 文档，但我一直坚持为它们创建符号链接。我希望他们的名字有序列号。问题是它不起作用，即使有简单的规则。
我的规则，应该做我想要的：
ACTION=="add", SUBSYSTEM=="tty", \
ATTR{idVendor}=="10c4", ATTR{idProduct}=="ea70",
ENV{ID_MODEL}=="CP2105_Dual_USB_to_UART_Bridge_Controller", \
SYMLINK+="CP2105$env{ID_USB_INTERFACE_NUM}-$env{ID_SERIAL_SHORT}"
更简单的尝试，应该在末尾添加两个不同数字的符号链接：
ACTION=="add", SUBSYSTEM=="tty", ATTR{idVendor}=="10c4", ATTR{idProduct}=="ea70", SYMLINK+="CP2105%n"
我也有一个规则，它有效，但做了其他事情（阻止其他驱动程序写入此设备）：
SUBSYSTEM=="usb", ATTR{idVendor}=="10c4", ATTR{idProduct}=="ea70", ENV{ID_MM_DEVICE_IGNORE}="1"
我的第一台设备的 udevadm 信息输出：
udevadm info -q all /dev/ttyUSB0
P: /devices/pci0000:00/0000:00:14.0/usb3/3-5/3-5.3/3-5.3:1.0/ttyUSB0/tty/ttyUSB0
N: ttyUSB0
S: serial/by-id/usb-Silicon_Labs_CP2105_Dual_USB_to_UART_Bridge_Controller_0087144E-if00-port0
S: serial/by-path/pci-0000:00:14.0-usb-0:5.3:1.0-port0
E: DEVLINKS=/dev/serial/by-path/pci-0000:00:14.0-usb-0:5.3:1.0-port0 /dev/serial/by-id/usb-Silicon_Labs_CP2105_Dual_USB_to_UART_Bridge_Controller_0087144E-if00-port0
E: DEVNAME=/dev/ttyUSB0
E: DEVPATH=/devices/pci0000:00/0000:00:14.0/usb3/3-5/3-5.3/3-5.3:1.0/ttyUSB0/tty/ttyUSB0
E: ID_BUS=usb
E: ID_MM_CANDIDATE=1
E: ID_MODEL=CP2105_Dual_USB_to_UART_Bridge_Controller
E: ID_MODEL_ENC=CP2105\x20Dual\x20USB\x20to\x20UART\x20Bridge\x20Controller
E: ID_MODEL_FROM_DATABASE=CP210x UART Bridge
E: ID_MODEL_ID=ea70
E: ID_PATH=pci-0000:00:14.0-usb-0:5.3:1.0
E: ID_PATH_TAG=pci-0000_00_14_0-usb-0_5_3_1_0
E: ID_PCI_CLASS_FROM_DATABASE=Serial bus controller
E: ID_PCI_INTERFACE_FROM_DATABASE=XHCI
E: ID_PCI_SUBCLASS_FROM_DATABASE=USB controller
E: ID_REVISION=0100
E: ID_SERIAL=Silicon_Labs_CP2105_Dual_USB_to_UART_Bridge_Controller_0087144E
E: ID_SERIAL_SHORT=0087144E
E: ID_TYPE=generic
E: ID_USB_DRIVER=cp210x
E: ID_USB_INTERFACES=:ff0000:
E: ID_USB_INTERFACE_NUM=00
E: ID_VENDOR=Silicon_Labs
E: ID_VENDOR_ENC=Silicon\x20Labs
E: ID_VENDOR_FROM_DATABASE=Cygnal Integrated Products, Inc.
E: ID_VENDOR_ID=10c4
E: MAJOR=188
E: MINOR=0
E: SUBSYSTEM=tty
E: TAGS=:systemd:
E: USEC_INITIALIZED=5571337818
第二个：
udevadm info -q all /dev/ttyUSB1
P: /devices/pci0000:00/0000:00:14.0/usb3/3-5/3-5.3/3-5.3:1.1/ttyUSB1/tty/ttyUSB1
N: ttyUSB1
S: serial/by-id/usb-Silicon_Labs_CP2105_Dual_USB_to_UART_Bridge_Controller_0087144E-if01-port0
S: serial/by-path/pci-0000:00:14.0-usb-0:5.3:1.1-port0
E: DEVLINKS=/dev/serial/by-path/pci-0000:00:14.0-usb-0:5.3:1.1-port0 /dev/serial/by-id/usb-Silicon_Labs_CP2105_Dual_USB_to_UART_Bridge_Controller_0087144E-if01-port0
E: DEVNAME=/dev/ttyUSB1
E: DEVPATH=/devices/pci0000:00/0000:00:14.0/usb3/3-5/3-5.3/3-5.3:1.1/ttyUSB1/tty/ttyUSB1
E: ID_BUS=usb
E: ID_MM_CANDIDATE=1
E: ID_MODEL=CP2105_Dual_USB_to_UART_Bridge_Controller
E: ID_MODEL_ENC=CP2105\x20Dual\x20USB\x20to\x20UART\x20Bridge\x20Controller
E: ID_MODEL_FROM_DATABASE=CP210x UART Bridge
E: ID_MODEL_ID=ea70
E: ID_PATH=pci-0000:00:14.0-usb-0:5.3:1.1
E: ID_PATH_TAG=pci-0000_00_14_0-usb-0_5_3_1_1
E: ID_PCI_CLASS_FROM_DATABASE=Serial bus controller
E: ID_PCI_INTERFACE_FROM_DATABASE=XHCI
E: ID_PCI_SUBCLASS_FROM_DATABASE=USB controller
E: ID_REVISION=0100
E: ID_SERIAL=Silicon_Labs_CP2105_Dual_USB_to_UART_Bridge_Controller_0087144E
E: ID_SERIAL_SHORT=0087144E
E: ID_TYPE=generic
E: ID_USB_DRIVER=cp210x
E: ID_USB_INTERFACES=:ff0000:
E: ID_USB_INTERFACE_NUM=01
E: ID_VENDOR=Silicon_Labs
E: ID_VENDOR_ENC=Silicon\x20Labs
E: ID_VENDOR_FROM_DATABASE=Cygnal Integrated Products, Inc.
E: ID_VENDOR_ID=10c4
E: MAJOR=188
E: MINOR=1
E: SUBSYSTEM=tty
E: TAGS=:systemd:
E: USEC_INITIALIZED=5570324399
有人可以帮忙吗？