revert this(https://github.com/iptux/android_device_xiaomi_mione_plus/commit/7af031c64f4f9cf69a87f1d5517bb8b18b98590b),just go check this(https://github.com/CyanogenMod/android_system_core/commit/e6d6bcdfa8a6dcd02b576966afb50daa69e2bd11)