Re: [PATCH v3] tools/memory-model: Weaken ctrl dependency definition in explanation.txt

[Alan Stern]

On Sat, Sep 03, 2022 at 01:41:34PM +0200, Paul Heidekrüger wrote:
> On 3. Sep 2022, at 03:27, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote:
> 
> > On Fri, Sep 02, 2022 at 09:13:40PM +0000, Paul Heidekrüger wrote:
> >> +Finally, a read event X and another memory access event Y are linked by
> >> +a control dependency if Y syntactically lies within an arm of an if
> >> +statement and X affects the evaluation of the if condition via a data or
> >> +address dependency (or similarly for a switch statement).  Simple
> >> +example:
> >> 
> >> 	int x, y;
> 
> Hang on, shouldn't this read "a write event" instead of "another memory
> access event"? Control dependencies only provide ordering from READ_ONCE to
> WRITE_ONCE, not from READ_ONCE to (READ | WRITE)_ONCE?
> 
> Or am I missing something?

Whoops, you're right.  Somehow I missed that.  Go ahead and change it; 
you can keep by S-O-B.

Alan