USB failed after upgrade

After Upgrading from r300442 to r301090, I found a problem about USB(s).

This is what i have done:

svn co https://svn0.us-west.freebsd.org/base/head /usr/src/
and
make buildworld & make installworld
at last
make buildkernel KERNCONF=Gn3 & make installkernel KERNCONF=Gn3

After rebooting the system, I have no USB input device.
Code:
#ls /dev/|grep ^u
ufsid
ufssuspend
ugen0.1
ugen0.2
ugen1.1
ugen1.2
urandom
usb
usbctl

USB configuration in my Gn3 kernel:
Code:
options  USB_DEBUG  # enable debug msgs
device  uhci  # UHCI PCI->USB interface
device  ohci  # OHCI PCI->USB interface
device  ehci  # EHCI PCI->USB interface (USB 2.0)
device  usb  # USB Bus (required)
device  uftdi  # For FTDI usb serial adapters
device  uvscom  # USB serial support for DDI pocket's PHS

Thanks and sorry for poor English .
 
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