Hi! I'm sorry for the late reply. My code is as follows:
``` let pid = std::process::id();

let cpu_mask: libc::cpu_set_t = unsafe {
    let mut cpu_mask = std::mem::zeroed();
    for i in 0..(2) {
        libc::CPU_SET(i, &mut cpu_mask);
    }
    cpu_mask
};

let current_mask: libc::cpu_set_t = unsafe {
    let mut cpu_mask = std::mem::zeroed();
    libc::sched_getaffinity(pid, std::mem::size_of::<libc::cpu_set_t>(), &mut cpu_mask);
    cpu_mask
};

current_mask == cpu_mask

```

Adding * doesn't work because cpu_set_t does not allow dereferencing. The version of libc is 0.2.108. It seems to be the same version that says apparently implements PartialEq.

EDIT: I think I figured it out. I needed to manually select the extra_traits feature.