1. 根目录:
2. arch
3. xtensa
4. lib
5. Makefile

#
# Makefile for Xtensa-specific library files.
#

lib-y	+= memcopy.o memset.o checksum.o \
	   usercopy.o strncpy_user.o strnlen_user.o
lib-$(CONFIG_PCI) += pci-auto.o