__sum16            36 include/uapi/linux/types.h typedef __u16 __bitwise __sum16;
__sum16            16 tools/testing/selftests/bpf/include/uapi/linux/types.h typedef __u16 __bitwise __sum16;
__sum16            13 tools/testing/selftests/bpf/test_progs.h typedef __u16 __sum16;