original_kernel/arch/x86_64/lib
..
Makefile
bitops.c
bitstr.c
clear_page.S
copy_page.S
copy_user.S
csum-copy.S
csum-partial.c
csum-wrappers.c
delay.c
getuser.S
io.c
iomap_copy.S
memcpy.S
memmove.c
memset.S
putuser.S
thunk.S
usercopy.c