On 07-06-18, 10:46, Daniel Lezcano wrote: > Yes, correct. > > But if we don't care about who wins to store to value, is there a risk > of scramble variable if we just assign a value ?
Normally no, as the compiler wouldn't screw it up badly. But there is no rule which stops the compiler from doing this: idle_duration_ms = 5; idle_duration_ms = -5; idle_duration_ms = 0; idle_duration_ms = <real-value-we-want-to-write>; So we *must* use READ/WRITE_ONCE() to make sure garbage values aren't seen by readers. -- viresh
