* 'atomics' of https://github.com/bvanassche/fio:
Optimize fio_gettime_offload()
Optimize the seqlock implementation
Add a test that sets gtod_cpu=1
t/run-fio-tests.py: Increase IOPS tolerance further
fio: Use atomic_load_acquire() and atomic_store_release() where appropriate
engines/io_uring: Use atomic_{load_acquire,store_release}()
engines/libaio: Use atomic_store_release() instead of read_barrier()
arch/arch.h: Introduce atomic_{load_acquire,store_release}()
fio_sem: Remove a read_barrier() call
Make __rand_0_1() compatible with clang
configure: Use -Wimplicit-fallthrough=2 instead of -Wimplicit-fallthrough=3