Stephen,

Thanks for your comments!  I'm evaluating the generic code of spinlock
on std atomics of LoongArch toolchain. An updated patch will come later.

On Sat, 28 May 2022 17:32:52 +0800
Min Zhou <zhoumin@loongson.cn> wrote:

This patch adds spinlock operations for LoongArch architecture.
These implementations refer to GLIBC pthread_spin_xxlock(). The
underlying implementation is based on LoongArch atomic
instructions (ie, AMSWAP_DB.W).

Signed-off-by: Min Zhou <zhoumin@loongson.cn>

If you supported std atomics, then the g eneric code
could work here.