BPF_CORE_READ_STR_INTO
BPF_CORE_READ_STR_INTO(&devname, dev, name);
BPF_CORE_READ_STR_INTO(&data.comm, task, comm);
BPF_CORE_READ_STR_INTO(&data.comm, task, comm);
BPF_CORE_READ_STR_INTO(&name, map, name);
out->comm_len = BPF_CORE_READ_STR_INTO(
out->comm_len = BPF_CORE_READ_STR_INTO(&out->comm, task, comm);
out->comm_len = BPF_CORE_READ_STR_INTO(&out->comm, task, comm);