bytes: 1.0.1 does not compile for arm-thumb-v6m targets (Cortex-M0)

You can reproduce by cloning cortex-m-quickstart and setting target accordingly in .cargo/config

$ rustc --version
rustc 1.48.0 (7eac88abb 2020-11-16)
$ cargo --version
cargo 1.48.0 (65cbdd2dc 2020-10-14)

error: could not compile `bytes`

To learn more, run the command again with --verbose.
warning: build failed, waiting for other jobs to finish...
error: build failed
error[E0599]: no method named `fetch_add` found for struct `AtomicUsize` in the current scope
   --> /home/erik/.cargo/registry/src/github.com-1ecc6299db9ec823/bytes-1.0.1/src/bytes.rs:970:38
    |
970 |     let old_size = (*shared).ref_cnt.fetch_add(1, Ordering::Relaxed);
    |                                      ^^^^^^^^^ method not found in `AtomicUsize`

error[E0599]: no method named `compare_exchange` found for reference `&AtomicPtr<()>` in the current scope
    --> /home/erik/.cargo/registry/src/github.com-1ecc6299db9ec823/bytes-1.0.1/src/bytes.rs:1030:16
     |
1030 |     match atom.compare_exchange(ptr as _, shared as _, Ordering::AcqRel, Ordering::Acquire) {
     |                ^^^^^^^^^^^^^^^^ method not found in `&AtomicPtr<()>`

error[E0599]: no method named `fetch_sub` found for struct `AtomicUsize` in the current scope
    --> /home/erik/.cargo/registry/src/github.com-1ecc6299db9ec823/bytes-1.0.1/src/bytes.rs:1058:23
     |
1058 |     if (*ptr).ref_cnt.fetch_sub(1, Ordering::Release) != 1 {
     |                       ^^^^^^^^^ method not found in `AtomicUsize`

error[E0599]: no method named `fetch_add` found for struct `AtomicUsize` in the current scope
    --> /home/erik/.cargo/registry/src/github.com-1ecc6299db9ec823/bytes-1.0.1/src/bytes_mut.rs:1201:37
     |
1201 |     let old_size = (*ptr).ref_count.fetch_add(1, Ordering::Relaxed);
     |                                     ^^^^^^^^^ method not found in `AtomicUsize`

error[E0599]: no method named `fetch_sub` found for struct `AtomicUsize` in the current scope
    --> /home/erik/.cargo/registry/src/github.com-1ecc6299db9ec823/bytes-1.0.1/src/bytes_mut.rs:1210:25
     |
1210 |     if (*ptr).ref_count.fetch_sub(1, Ordering::Release) != 1 {
     |                         ^^^^^^^^^ method not found in `AtomicUsize`

error: aborting due to 5 previous errors

For more information about this error, try `rustc --explain E0599`.
       Error Failed to run cargo build: exit code = Some(101)