opt_umem_flags 71 samples/bpf/xdpsock_user.c static u32 opt_umem_flags; opt_umem_flags 291 samples/bpf/xdpsock_user.c .flags = opt_umem_flags opt_umem_flags 442 samples/bpf/xdpsock_user.c opt_umem_flags |= XDP_UMEM_UNALIGNED_CHUNK_FLAG;