Tear down io_uring submission and completion
queues
# DESCRIPTION
[io_uring_queue_exit] will release all resources acquired and
initialized by [io_uring_queue_init]. It first unmaps the memory
shared between the application and the kernel and then closes the
io_uring file descriptor.
Some accounting is done asynchronously, so memory locked by
[io_uring_queue_init] may remain locked for a few milliseconds
after this function returns.
# RETURN VALUE
None
# SEE ALSO
[io_uring_setup], [mmap](https://man7.org/linux/man-pages/man2/mmap.2.html), [io_uring_queue_init]