usb/core/buffer.c doesn't export any symbols, so it should use
!I instead of !E to eliminate this warning message:

Warning(/var/linsrc/linux-2614-rc4//drivers/usb/core/buffer.c): no structured comments found
Signed-off-by: NRandy Dunlap <rdunlap@xenotime.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>