task_set_vl_onexec
void task_set_vl_onexec(struct task_struct *task, enum vec_type type,
task_set_vl_onexec(task, ARM64_VEC_SVE, vl);
task_set_vl_onexec(current, type, 0);
task_set_vl_onexec(task, type, vl);
task_set_vl_onexec(task, type, 0);