On Fri, Jan 10, 2020 at 5:56 PM Will Deacon <will@xxxxxxxxxx> wrote:
> +/*
> + * Use __READ_ONCE() instead of READ_ONCE() if you do not require any
> + * atomicity or dependency ordering guarantees. Note that this may result
> + * in tears!
> + */
> +#define __READ_ONCE(x) (*(volatile typeof(x) *)&(x))
> +
This probably allows writing
extern int i;
__READ_ONCE(i) = 1;
and not get a warning for it. How about also casting to 'const'?
Arnd
