[Bug target/107567] __atomic_test_and_set generates non-atomic code on armv6-m

[chris.n.copeland at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107567

--- Comment #3 from Chris Copeland <chris.n.copeland at gmail dot com> ---
Fantastic! Thank you for looking into it.